1978 GMC G25 Performance and Racing Products

Name: Ultra Seal: Intake Gasket
Brand: Mr. Gasket
SKU: 5817
Price: 51.99 USD

Below you will find various in-demand GMC Performance and Racing Products, components and accessories for your 1978 G25. Advance Auto Parts has popular G25 parts like Performance Engines, Performance Exhaust Products, Performance Distributors and more. You’ll also find aftermarket and OEM Performance and Racing Products for other G25 model years including 1968, 1975, 1976, 1977 and more. Select a category of 1978 GMC G25 Performance and Racing Products below and start saving instantly.

Please Select your Vehicle to See Exact Fit Parts

Popular 1978 GMC G25 Performance and Racing Products Categories

Performance Carburetors

Performance Engine Coolant Thermostats

Performance Intake Manifolds

Performance Fuel Pumps

Performance Coils

Performance Distributor Cap and Rotor Kits

Performance Shifters

Performance Distributors

Performance Transmission Dipstick Tubes

Performance Valve Covers

Performance Water Outlet Gaskets

Performance Engine Dress-Up Kits

Performance Engine and Transmission Mounts

Performance Engine Water Pumps

Performance Water Outlets

Performance Radiator Caps

Performance Engine Cylinder Head Gaskets

Performance Engine Camshaft and Lifter Kits

Performance Distributor Rotors

Performance Engine Harmonic Balancers

Performance Differential Covers

Performance Ignition Modules

Performance Distributor Components

Performance Engine Intake Manifold Gaskets

Performance Engine Timing Sets and Components

Performance Engine Valve Springs

Performance Engine Valve Cover Gasket Sets

Performance Spark Plug Wires

Performance Flywheel and Flexplates

Performance Exhaust Manifold Gaskets

Performance Valve Cover Hardware

Performance Engine Rocker Arms

Performance Exhaust Header Hardware

Performance Engine Camshafts

Performance Engine Oil Pan Gaskets

Performance Ring and Pinions

Performance Ignition Parts

Performance Intake Manifold Hardware

Performance Pulleys

Performance Engine Valve Lifters

Performance Engine Main Bearing Gasket Sets

Performance Transmission Shift Kits

Performance Engine Push Rod Guideplates

Performance Engine Cylinder Head Installation Kits

Performance Wheel Bearing Dust Caps

Performance Engine Push Rods

Performance Engine Valve Spring Retainer

Performance Torque Converters

Performance Engine Cylinder Heads

Performance Ignition Systems

Performance Engine Valve Stem Seal Sets

Performance Engine Camshaft Bolts

Performance Flywheels

Performance Alternator or Generators

Essential Performance and Racing Products for 1978 GMC G25s

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$51.99

Ultra-Seal intake manifold gaskets are manufactured from cellulose/nitrile composition gasket material. Provides excellent sealing and durability. Incorporates Silicone beading around each intake and water outlet port to provide additional sealing strength on both sides of each gasket. No gasket sealer required. For OE replacement, high performance street, drag race and oval track use. Includes manifold end seals and distributor gasket.

Product Features:

Manufactured from cellulose/nitrile composition gasket material
Provides excellent sealing and durability
Silicone beading on both sides of each gasket
Complete with manifold end seals and distributor gasket
For OE replacement, high performance street, drag race and oval track use
Creates Tight Leak proof Seal

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$21.49

Mr. Gasket cam locking plates feature a steel retainer plate designed to secure the cam gear bolts from coming loose and backing out, preventing costly engine damage. Retainer plate fits under bolt heads allowing tabs to be bent against hex head flats creating a secure positive lock.

Product Features:

Black oxide finished steel
Includes (3) grade 5 bolts & locking plate
Fits Chevrolet Small and Big Block without OE roller cam
Tabs bend up around bolt head to secure

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$474.99

The Edelbrock 1407 Performer Series 750 CFM manual choke carburetor is a precisely tuned, quality-built carburetor that can handle the rigors of daily driving while delivering consistent, reliable street performance from day to day. Several characteristic

Product Features:

Edelbrock products offer improved performance and aesthetics for a broad array of vehicles and engines. ‘Proven performance’ is the philosophy by which Edelbrock was founded and it continues to this day with the highest standards for performance and quali
Manual Choke
4 Barrel Count
Square Bore
Smooth Secondary Transition
Both Timed and Full Vacuum Ports
Includes PCV Outlet

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$1065.99

Product Features:

50-State Street Legal Aluminum Cylinder Head
Out-of-the-Box Bolt-On Performance
70cc Combustion Chambers Improve Performance
Retain Stock Compression Ratio

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$1166.99

Designed to deliver an aggressive, hard-hitting exhaust note at idle, the Thumpr camshaft series from COMP Cams also delivers excellent horsepower gains and a broad torque curve. A perfect choice for muscle cars and street rods.

Product Features:

Early intake valve opening and long exhaust duration create optimum overlap for powerful, hard-hitting exhaust note.
Best with aftermarket converters and more rear gear.
Three unique cam designs for each application that deliver excellent horsepower gains and broad torque curve; perfect choice for muscle cars and street rods.

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$259.99

Featuring a quicker valve opening, the Xtreme Energy camshaft profile provides increased responsiveness and more area under the lift curve than older, slower grinds. Designed to increase performance without sacrificing driveability and creature comforts,

Product Features:

Excellent performance in street carbureted applications.
More vacuum allows an increase in duration for improved performance and assists power brakes.
Quicker opening lobe profiles deliver increased responsiveness and more area under the lift curve.
Best performance with aftermarket intake manifolds, headers, lower gear ratios etc.

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$116.99

Engineered for faster rise time, longer spark duration and increased performance. Unique design with premium grade wire, special low resistance, high turns ratio windings. Produces higher spark energy with breaker less electronic ignition systems. For points application the supplied 0.85 ohm ballast resistor must be used in conjunction with the vehicle original ballast resistor, if so equipped. Oversized molded case with integral cooling fins and high capacity oil filled construction provide high thermal conductivity ensuring cool operation and long life. Extra tall tan Alkyd tower and integral voltage dam eliminate “flashover” to primary terminals. Comes complete with mounting hardware and 0.85 ohm ballast resistor. Effective up to 6,500 RPM.

Product Features:

Oil Filled For Better Cooling
Optimized Low Resistance
Silicon Magnetic Steel E-Core
Higher Energy/Voltage Outputs
Quicker Starts
Improved Idle Quality
Resists Shock And Vibration
Resists Corrosion

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$972.99

HoleShot 3600 for GM 1965 to 1991 TH400, 425, 375 and 1968 to 1981 TH350, 375B (not 350C) APPLICATION: HoleShot 3600 for GM 1965 to 1991 TH400, 425, 375 and 1968 to 1981 TH350, 375B (not 350C) A higher than stock stall speed as delivered by the Holeshot converter will provide several advantages and benefits in vehicles with modified engines. Many modifications, particularly big cams, tend to reduce low end power and torque. The high stall converter allows the engine to launch the car at higher rpm where more torque is available. The Holeshot is generally a very good choice for the typical street machine that is looking for better launch capability and more strength. Street rods with modified engines will also benefit from a Holeshot converter. If your vehicle is equipped with a plate type nitrous system, you will need a Nitrous Holeshot!! Stall speed listings are based on engines producing 230lb. ft. of torque at 2,500 rpm. More torque at 2,500 rpm will give you more stall speed, less torque at 2,500 rpm will give you less stall speed than the stall speed ratings indicated. Furnace brazed impeller. New precision steel alloy pump drive tube. New heavy duty needle bearing between stator and impeller (not a thrust washer). Needle bearing between stator and turbine. Furnace brazed turbine. Dual pattern drive lugs on some GM Holeshots. New turbine hub. New springs and rollers in stator.

Product Features:

Furnace Brazed Impeller
Steel Alloy Pump Drive Tube
Heavy Duty Needle Bearing
Between Stator and Turbine
Furnace Brazed Turbine
Dual Pattern Drive Lugs
New Turbine Hub
New Springs/Rollers In Stator

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$77.99

This high performance HEI module provides your plugs with more spark over the stock module. The solid state electronics provide high coil out put and superior reliability. The Dwell control circuit ensures, long consistent coil charging. The current control circuit protects against coil over heating. This module fits most GM HEI for V8 engines with the 4 pin module 1974 thru 1985

Product Features:

Fits Most Stock And Modified Distributors
Solid State Electronics
Dwell Control Circuit

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$9.99

Spectre’s Valve Cover Spreader Bar Kits are designed to improve the seal between your valve cover and cylinder head. Constructed from high quality heavy gauge steel, the spreader bars help to evenly distribute clamping pressure, preventing leaks. Featuring a triple chrome-plated finish, this kit is designed to fit Chevrolet 265-400 Small Block engines.

Product Features:

Designed for Chevrolet 265-400 Small Block engines
Features a triple chrome-plated finish
Constructed from heavy gauge steel
Engineered to improve valve cover seal

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$479.99

Magnum Pushrods from COMP Cams offer an affordable solution for your .080″ wall chromemoly pushrod needs. Designed to withstand the stresses of a high performance engine, Magnum Pushrods are head-treated for extended durability and have precision formed, reinforced ends. Magnum Pushrods are black-oxide finished with their part number and length laser etched onto the surface for easy identification. Available individually and in sets of 8 or 16.

Product Features:

3/8″ Diameter, 8.280″ intake length (qt. 8), 9.250″ exhaust length (qt.8) for Big Block Chevy
One-piece .080″ wall chromemoly steel tubing
Heat-treated for extended durability and guide plate compatibility
Precision formed and reinforced pushrod end
Black-oxide finished with laser-etched part number and length

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$149.99

Includes: 2 short flat black valve covers 2 valve cover gaskets 1 flat black push-on breather 1 flat black dipstick & tube 1 flat black timing chain cover 1 flat black timing tab 1 rubber grommet for valve cover PCV hole 1 breather grommet

Product Features:

Ideal Starter Kit
Enhances Appearance

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$30.99

Fits Chevy small block and big block engines with 0.491″ shaft. Replacement component.

Product Features:

Engine Distributor Gear
Made from Steel
Made from Steel
Fits .491″ Diameter Shaft
For Chevy V8 Engine Distributors
Fits .491″ Diameter Shaft
PROFORM Parts Brand Product
100% New Components; Not Re-man or Refurbished
Roll Pin Not Included
PROFORM Parts Brand Product

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$537.99

For a long time, racers have known that one of the best things to do to an engine to improve performance is to stabilize the ignition timing. The MSD Flying Magnet Crank Trigger system does exactly that by using four magnets embedded in an aluminum wheel. Although similar in appearance to other crank triggers, the MSD Flying Magnet design works on a different principle. Most crank triggers have a wheel, with steel studs sticking out, bolted to the harmonic balancer. As the crankshaft turns, the studs pass by a stationary magnetic pick-up, triggering the ignition. This pick-up can be triggered by other bolts, debris, or even vibrations which will cause a loss of power or engine damage.

Product Features:

Absolutely the most accurate way to trigger the ignition.
The non-magnetic pickup cannot be false triggered.
Powerful magnets are embedded in a billet aluminum trigger wheel.
Kits feature special brackets and mounting hardware for a variety of engines.

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$44.49

Manufactured from high-temperature steel core/graphite faced exhaust material. Expanded steel core provides stability and maximum torque retention to eliminate gasket failure. Graphite facing provides excellent heat resistance and thermal conductivity to transfer heat away from the cylinder head. Conforms to and seals minor surface irregularities. High recovery material allows header or manifold flange to stay sealed if flange loses clamp-load. Can be trimmed if necessary for modified port applications. For original equipment replacement, high performance street, drag race and oval track use.

Product Features:

Manufactured from high-temperature steel core/graphite faced exhaust material
Expanded steel core provides stability and maximum torque retention to eliminate gasket failure
Graphite impregnated facing provides excellent heat resistance and thermal conductivity to transfer heat away from the cylinder head
Conforms to and seals minor surface irregularities
Can be trimmed if necessary for modified port applications
For OE replacement, high performance street, drag race and oval track use
Anti-Stick Properties
Easy Removal For Disassembly

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$71.99

Mr. Gasket Ultra-Seal Head Gaskets are a five layer (graphite core/perforated steel outer layers) composite construction. The graphite core has excellent thermo conductivity (transfers heat) away from hot spots in head preventing gasket burn-out. They provide excellent stability, compressibility and high temperature endurance. A high temperature silicone coating ensures sealing of engine fluids. Compatible with cast iron or aluminum heads, they will not brinell (indent) aluminum cylinder heads. Suitable for high performance street, drag race and oval track use. Sold individually. Gasket bore 4.100 inch, Compressed thickness 0.028 inch

Product Features:

Five layer (graphite core/perforated steel outer layers) composite construction
Graphite core is excellent transferring heat away from hot spots in head preventing gasket burn-out.
Provides excellent stability, compressibility and high temperature endurance
Coated with high temperature silicone to ensure sealing of engine fluids
Will not brinell (indent) aluminum cylinder heads
For high performance street, drag race and oval track use

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$351.99

Richmond Gear is the leading manufacturer of professional quality, high-performance drivetrain products. Our complete line of products ranges from high performance ring-and-pinion sets for serious street and racing applications to torque-hungry manual transmissions and components. Richmond Gear products have been winners both at the Daytona 500 and U.S. Nationals for decades. WINNERS RUN RICHMOND!

Product Features:

For over 80-years, the Richmond Double-Diamond logo has represented some of the highest quality gears in the racing industry. Winners Run Richmond!
The superior quality of Richmond gearsets is a result of outstanding design, world class manufacturing and an extensive testing process that is performed on all products.
Richmond performance gearsets have been winners for decades at: NHRA, NMRA, NMCA, Daytona 500, WISSOTA and U.S. Nationals.
Richmond Gear is a leading manufacturer of high performance ring and pinion gearsets and drivetrain components, backed by a two year warranty.
Engineered to perform faster and be more reliable, Richmond performance drivetrain products are the result of a continuous research and development program combined with state-of-the-art manufacturing capabilities.

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$42.99

This Spectre Alternator Bracket Kit was designed for 1969-1986 Chevrolet Small Block engines with a long water pump. This triple chrome-plated kit includes two brackets and the hardware needed to mount your alternator in a clean and professional way.

Product Features:

Designed for ’69-’86 Chevrolet Small Block engines with long water pump
Kit includes two brackets and mounting hardware
Triple chrome plated
Manufactured with high quality materials

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$166.99

The B&M Transpak has all the features in the Shift Improver Kit, plus it provides additional driver manual control. Retain full automatic features and standard shift points with selector in Drive.

Product Features:

Recalibrate Auto. Transmission
Optimum Performance
Select Your App. Mode
Improves Transmission Life
Trans. Removal Not Required
Downshift At Any Speed
Great For Trailer Towing
For Heavy Loads Driving Downhill

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$13.99

This Spectre Fuel Pump Mounting Plate for short block Chevrolet engines comes with a gasket, four bolts and four washers. It is used to mount mechanical fuel pumps. It is also triple chrome plated.

Product Features:

Small block Chevrolet, use for mounting mechanical fuel pumps
Includes mounting plate gasket
Includes chrome mounting bolts with washers
Triple chrome plated

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$64.99

ACCEL’s SuperStock 4000 series spark plug wire sets are designed to upgrade an OE ignition system for high-spark delivery levels for street driven applications. The 450 degree F rated silicone jacket is extruded over a tightly woven, rugged fiberglass braid. The braid is applied over high dielectric strength EPDM (Ethylene Propylene Diene Monomer) inner insulation for ignition wire performance that exceeds SAE specifications.

Product Features:

7mm And 8mm High Gloss Silicone Jacket
450 F Rated Silicone Jacket
Stainless Steel Plug Terminals
RFI Suppression For Street Driven Applications
Custom-fit Universal And Import Coverage
High-strength Fiberglass Braid Construction
Pre And Post HEI Vehicles

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$43.99

Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:

Fluoroelastomer compound combines optimum resistance to heat, oils and abrasion for longivity.
Optimizes performance under high crankcase vacuum conditions, elevated temperatures and high RPM levels.
Not intended for use in emission controlled vehicles.

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$453.99

Hays aluminum flywheels are manufactured from certified billet material that will not break up under the stress of high RPM and severe punishment of racing. Features replaceable steel surface insert. Precision balanced to either neutral (internal) or Detroit (external) specifications. Meets SFI specification 1.1 for racing.

Product Features:

Certified Billet Material
Borg and Beck Clutch Pattern
Long-Style Clutch Pattern
Ring Gear Securely Mounted To Prevent Spinning

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$85.99

The Mr. Gasket chrome plated rear end cover is made from heavy-gauge steel, and comes complete with bolts and gaskets.

Product Features:

Chrome plated steel for looks
Includes bolts and gasket

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$249.99

New chromed steel pulleys are a replacement for originals and are designed as matched sets to assure correct alignment of the drive belts. They are highly polished then chrome plated. Crankshaft Pulley = 7.30 inch diameter Water Pump Pulley = 6.30 inch diameter

Product Features:

Chrome plated steel
Designed as matched assemblies

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$318.99

The Mr. Gasket chrome alternator is a high-performance, remanufactured solution designed to exceed original equipment specifications, ensuring maximum dependability for your vehicle. With an 80-amp output and a sleek chrome-plated finish, this GM 10SI style alternator is both functional and visually appealing. It fits most 1973-1983 GM vehicles, making it a versatile replacement option. The alternator features a 6.6″ bolt spacing, an internal regulator for efficient voltage control, and a 1-groove V-belt pulley included for easy installation. Operating at 12 volts, it can be used as a direct OE replacement or as a 1-wire alternator, offering flexibility to suit your needs. Built for durability and reliability, this alternator is an excellent choice for restoring or upgrading your vehicle’s electrical system.

Product Features:

Fits Most 1973-1983 GM Vehicles
Bolt Spacing 6.6″
80 Amps
GM 10SI Style Alternator
Chrome Plated Finish
1-Groove V-belt pulley – included
Internal Regulator

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$64.99

Springs made of highest quality spring wire. Springs precision wound to close tolerances. Non-Rotator style: Dyno tested and street proven. Great match to Edelbrock camshaft kit.

Product Features:

For Use With Cast Iron Heads
Springs Made of Highest Quality Spring Wire
Springs Precision Wound To Close Tolerances
Use with Original Equipment Heads Only

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$159.99

Complete kit includes retainers and locks. Springs made of highest quality spring wire. Springs precision wound to close tolerances. Includes superior quality steel retainers. Includes 7 degree heat-treated valve stem locks. Retainers and locks are black oxide coated. Non-rotator style: Dyno tested and street proven. Great match to Edelbrock camshaft kit.

Product Features:

Complete Kit: Includes Retainers And Locks
Springs Made of Highest Quality Spring Wire
Springs Precision Wound To Close Tolerances
Includes Superior Quality Steel Retainers
Includes 7 deg. Heat-Treated Valve Stem Locks
Retainers and Locks Black Oxide Coated
Non-Rotator Style: Dyno Tested and Street Proven
Great Match to Edelbrock Camshaft Kit

Upgrade your 1978 GMC G25 with Top-Quality Performance and Racing Products

When it comes to maintaining or upgrading your 1978 GMC G25, nothing is more important than using high-quality OEM or aftermarket parts that you can trust. Whether you’re repairing damage to your GMC or enhancing its overall performance, Performance and Racing Products are key to keeping your G25 functioning at its best. At Advance Auto Parts, we offer a wide selection of 231 Performance and Racing Products for the 1978 GMC G25, designed to meet your needs without breaking the bank. From Performance Engine replacements to Performance Exhaust Products upgrades, we’ve got you covered with parts that fit your vehicle perfectly and ensure long-lasting performance.

Affordable Prices and Wide Selection

Shopping for Performance and Racing Products for any vehicle can be a hassle, especially if you’re on a budget. But with Advance Auto Parts, you can find high-quality Performance and Racing Products for your 1978 GMC G25 at great prices. Our Performance and Racing Products inventory for this model ranges from just $7.99 to $1,201.99, with an average price of $255.85. Our 231 Performance and Racing Products in stock come from 17 trusted brands, so you’re sure to find the right part for your 1978 GMC G25 without overspending.

Top Brands and High Customer Satisfaction

Advance Auto Parts takes pride in offering only the best brands in the automotive industry. For your 1978 GMC G25, we stock popular OEM and aftermarket Performance and Racing Products from top names like Richmond Gear, B & M, Competition Cams, and more. Richmond Gear Performance and Racing Products start at just $350.99 and boast an impressive 4.4 stars average rating from customers. B & M and Competition Cams also bring quality to the table, with Performance and Racing Products available starting at $83.99, and at an average 4.3 stars rating. With 1,738 customer reviews and counting, our 1978 GMC G25 Performance and Racing Products have a strong track record of reliability, ensuring you can trust your purchase.

Explore Related Parts and More

While you’re here, don’t forget to check out other essential categories that go hand in hand with Performance and Racing Product upgrades. Explore related part types like Batteries and Chargers, Oil and Lubricants and more to make sure your 1978 GMC G25 is always ready to roll. We’re committed to providing you with everything you need to keep your G25 in top shape, all in one place. Start shopping confidently below for your 1978 GMC G25!

Best-Selling Performance Engines for 1978 GMC G25s

Enhance the driving experience in your GMC with 134 quality Performance Engine components, starting at $7.99.

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$195.99

Edelbrock part No. 2701 Performer EPS intake manifold is designed for 1986 and earlier 262-400 cubic-inch Chevys. Edelbrock’s Patented Dual-plane, low-rise design with a 180-degree firing order greatly improves torque over a wide rpm range for excellent throttle response. With that the Edelbrock Performer EPS intake manifold has a runner design that’s “tuned” for peak torque at 3500 rpm on a 350-inch engine making it ideal for power from off-idle to 5500 rpm. Dyno tests showed gains of 5 hp and 9 ft-lbs. of torque over the Edelbrock Performer manifold No. 2101 on a 350 Chevy. From 3000 to 4500 rpm, the power increases averaged 5+ ft-lbs. of torque for more performance where you need it most. PLEASE NOTE: Will not fit under stock Corvette hood!

Product Features:

Maximizes Performance with Edelbrock Carburetors
Runners Tuned to Match Square Bore Carburetor
Maximizes Peak Torque Around 3500 RPM
Excellent Throttle Response and Mid-Range Power
For Idle to 5500 RPM Street-Driven Performance
Dual-Plane Low-Rise Intake w/180 deg. Firing Order
Prod. +5 HP and +9 ft/lbs. of Torque Over PN[2101]
PLEASE NOTE: Will not fit under stock Corvette hood!

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$42.49

Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:

PROPRIETARY COATING – Nonstick anti-friction coating seals small surface imperfections
NO RETORQUE DESIGN – Steel core helps eliminate the need for retorquing head bolts
SUPERIOR SEAL – Precise embossed Printoseal sealing beads at all vital areas to eliminate leak paths
STRONG AND DURABLE – Features graphite or reinforced fiber facing material and steel armor for strength and durability
DESIGNED FOR IMPERFECT SEALING SURFACES – Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces

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$44.99

Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:

Fel-Pro Performance head gaskets accommodate the high cylinder pressures and cylinder head movement associated with performance engines.
Inserted within a stainless steel armor surrounding each cylinder, wire ring design provides highly concentrated sealing around the combustion chamber.
Raises combustion sealing force to roughly three times that of standard head gaskets.
Steel wire rings for the greatest combustion seal strength.
Not intended for use in emission controlled vehicles.

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$31.99

Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:

Blue Stripe performance cork-rubber gaskets use cork particles evenly distributed throughout a rubber binder resulting in a compressible gasket without leak paths.
Not intended for use in emission controlled vehicles.

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$346.99

Product Features:

For Idle to 5500 RPM Street-Driven Performance
Dual-Plane Low-Rise Intake w/180 Deg Firing Order
Patented Runner Design Ensures Broad Torque Curve
Excellent Throttle Response and Mid-Range Power
50-State Street Legal if Correct Carburetor Used
Accepts Late-Model Choke; Waterneck; and HEI
Accepts A/C And Alternator
Accepts Exhaust Heated Chokes

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$279.99

Product Features:

For Idle to 5500 RPM Street-Driven Performance
Dual-Plane Low-Rise Intake w/180 Deg Firing Order
Patented Runner Design Ensures Broad Torque Curve
Excellent Throttle Response and Mid-Range Power
50-State Street Legal if Correct Carburetor Used
Accepts Late-Model Choke; Waterneck; and HEI
Accepts A/C And Alternator
Accepts Exhaust Heated Chokes

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$223.99

VALVE SEALS, O-RING 11/32″ 1 ST

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$64.99

For Use With Cast Iron Heads
Springs Made of Highest Quality Spring Wire
Springs Precision Wound To Close Tolerances
Use with Original Equipment Heads Only

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$21.49

Black oxide finished steel
Includes (3) grade 5 bolts & locking plate
Fits Chevrolet Small and Big Block without OE roller cam
Tabs bend up around bolt head to secure

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$217.99

These Magnum Roller Rocker Arms for Chevy V8 265-400 and V6 200-262 applications are the ultimate street rocker. With a 3/8″ stud diameter and 1.52 ratio, they are designed for serious performance enthusiasts. All Magnum Roller Rocker Arms are constructed

Product Features:

Roller tip reduces friction while stiff design and superior ratio accuracy yield more effective valve lift
For applications with less than 350 lbs. of open spring pressure
Constructed from 8620 chromemoly steel, a superior material that will not flex and ensures maximum lift
Ultimate street roller rocker arm designed for serious performance enthusiasts

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$83.99

COMP Cams Hi-Tech Roller Race Timing Sets include cast iron camshafts gears, induction hardened billet steel crank sprockets, and pre-stretched, heat-treated double roller chains with heavy-duty large pin design. They feature 3 keyway crank sprockets for

Product Features:

Cast iron camshaft gear and induction hardened billet steel crank sprocket
Pre-stretched, heat-treated true double roller chain with heavy-duty large pin design; chain available separately
Ideal for all street performance and race applications
Features 3 keyway crank sprocket for 4-degree incremental adjustability, 4-degree maximum advance/retard
Dynamically balanced and quality checked for run-out tolerances

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$159.99

Complete Kit: Includes Retainers And Locks
Springs Made of Highest Quality Spring Wire
Springs Precision Wound To Close Tolerances
Includes Superior Quality Steel Retainers
Includes 7 deg. Heat-Treated Valve Stem Locks
Retainers and Locks Black Oxide Coated
Non-Rotator Style: Dyno Tested and Street Proven
Great Match to Edelbrock Camshaft Kit

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$66.99

COMP Cams High Energy Timing Chain Sets include precision cast iron camshaft and crank gear sprockets and premium quality link belt type timing chain. These sets exceed all original equipment timing chain specifications and are ideal for stock replacement and mild performance applications.

Product Features:

Exceeds all original equipment timing chain specifications
Premium quality link belt type chain for exceptional durability; chain also available separately
Precision cast iron camshaft and crank gear sprockets
Ideal for stock replacement and mild performance applications

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$23.99

Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:

Die cut silicone rubber gaskets conform to out-of-flat covers
Great for on-again/off-again situations
Not intended for use in emission controlled vehicles.

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$50.99

Edelbrock part #7215 Intake Gaskets for 1958-1986 E-Tec 200 Small-Block Chevy allow for optimum flow and performance. Any gasket can create a seal, but a good gasket can do it with less clamping force, and for a longer period of time. The new MP-2N Microp

Product Features:

1.26″x2.24″
E-Tec Port Style
.120″ Thick
Two Piece Configuration
Composite Material

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$562.99

Torque Converter – Tork Master 3000 for GM 1965 to 1991 TH400, 425, 375 and 1968 to 1981 TH350, 375B (not 350C) APPLICATION: Tork Master 3000 for GM 1965 to 1991 TH400, 425, 375 and 1968 to 1981 TH350, 375B (not 350C) The Tork Master is B&M’s lowest cost performance torque converter. The Tork Master is an excellent all-around performance street converter. The best ‘value priced’ street converters available, Tork Master converters come with a new precision pump drive tube and all are pressure tested and fully balanced. The Tork Master torque converter is not recommended for big block or supercharged applications. New allow steel pump drive tube. Needle thrust bearing when factory equipped. New thrust washer between turbine and cover when required.

Product Features:

New Precision Pump Drive Tube
Pressure Tested
Fully Balanced
Needle Thrust Bearing
New Thrust Washer
Washer Between Turbine and Cover

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$382.99

Torque Converter – Tork Master 2400 for GM 1965 to 1991 TH400, 425, 375 and 1968 to 1981 TH350, 375B (not 350C) APPLICATION: Tork Master 2400 for GM 1965 to 1991 TH400, 425, 375 and 1968 to 1981 TH350, 375B (not 350C) The Tork Master is B&M’s lowest cost performance torque converter. The Tork Master is an excellent all-around performance street converter. The best value priced street converters available, Tork Master converters come with a new precision pump drive tube and all are pressure tested and fully balanced. The Tork Master torque converter is not recommended for big block or supercharged applications. New alloy steel pump drive tube. Needle thrust bearing when factory equipped. New thrust washer between turbine and cover when required. Due to torque converter core availability, the actual converter size may vary but performance functionality will be as advertised.

Product Features:

New Precision Pump Drive Tube
Pressure Tested
Fully Balanced
Needle Thrust Bearing
New Thrust Washer

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$351.99

Product Features:

Designed for Optimum Torque and Acceleration
Maximum Performance From Idle through Mid-Range
Matched to Edelbrock Performer Intakes
Includes Hydraulic Lifters and Assembly Lube
Major Improvement in Throttle Response and Torque
Use For Daily Drivers/Trucks/Vans/RVs/4x4s
Take The Guesswork Out Of Camshaft Selection

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$35.49

Mr. Gasket Ultra-Seal Intake Manifold Gasketss are manufactured from cellulose/nitrile composition gasket material. Provides excellent sealing and durability. Incorporates Silicone beading around each intake and water outlet port to provide additional sealing strength on both sides of each gasket. No gasket sealer required. For original equipment replacement, high performance street, drag race and oval track use. Includes manifold end seals and distributor gasket.

Product Features:

Manufactured from cellulose/nitrile composition gasket material
Provides excellent sealing and durability
Silicone beading on both sides of each gasket
Complete with manifold end seals and distributor gasket
For OE replacement, high performance street, drag race and oval track use

from

$15.49

This is a high quality bolt set that is made of grade 8 steel and will meet your requirements for a quality bolt set, this set will work on original equipment, high performance street, drag or circle track applications.

Product Features:

Has A Zinc Dichromate Finish
Made Of High Quality Grade 8 Steel
Has A Tall Hex Head To Prevent Wrench Slipping Off
Extra Thick Parallel Ground Washer
Washer Provides More Accurate And Uniform Torque

from

$35.49

Edge molded rubber water outlet gasket is reusable, great for engines that require regular disassembling for maintenance. Incorporates solid aluminum carrier for strength and rigidity. Can be used with OE replacement or aftermarket chrome water outlets. Requires no gasket sealer.

Product Features:

Edge Molded Rubber Water Outlet Gasket Is Reusable
Requires No Gasket Sealer
Solid Aluminum Carrier For Strength/rigidity
Reusable – Ideal for Engines That Are Frequently Taken Apart & Reassembled

from

$126.99

Spectre’s Engine Dress-Up Kit was designed for the ’58-’86 Chevrolet small block 265-400. This kit includes: stock height baffled covers, chrome T-bar hold downs, chrome PCV breather, chrome breather, chrome oil filler cap, grommets, and a stainless steel braided PCV hose with red/blue Magna-Clamps. Designed for use with OE specifications for fit and function, Spectre products are engineered to perform as good as they look.

Product Features:

For Chevrolet small block 265 and 400
Kit includes: stock height baffled covers, chrome T-bar hold downs, chrome PCV breather, chrome breather, chrome oil filler cap, grommets, and a stain
Designed for use with OE specifications for fit and function
Made from high quality material

from

$29.99

Mr. Gasket High Performance Thermostats are designed to resist large variations of coolant pressure at high RPM (revolutions per minute). This allows them to fully open at correct temperature consistently regardless of engine RPM. The design also provides the high flow that engines operated a higher RPM need. This thermostat also features a copper/brass construction to further resist corrosion. Mr. Gasket High Performance / High Flow Thermostats are suitable for street, drag race, or oval track applications.

Product Features:

Opens At 180 Degrees
Designed to Resist Large Variations of Coolant Pressure at High RPM
Fully Opens at Correct Temperature Consistently Regardless of Engine RPM
For High Performance Street, Drag Race, and Oval Track
Copper & Brass Construction – Resists Corrosion
High Flow

from

$29.99

Opens at 160 Degrees
Designed to Resist Large Variations of Coolant Pressure at High RPM
Fully opens at Correct Temperature Consistently Regardless of engine RPM
For High Performance Street, Drag Race, and Oval Track
Copper & Brass Construction – Resists Corrosion
High Flow

Most Popular 1978 GMC G25 Performance Exhaust Products

Customize your GMC with 13 Performance Exhaust Products products like Performance Exhaust Manifold Gaskets and Performance Exhaust Header Hardware, all priced under $95.99.

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from

$32.99

Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:

Performance exhaust header gasket consisting of a high-density fiber facing material attached to both sides of a perforated steel core.
Resists blowout and burnout from high-temperature exhaust and is far stronger than basic paper gaskets.
Anti-stick coating permits motion without damaging the gasket and makes it easier to remove the gasket for future engine service.
Slotted bolt holes allow for easier header installation.
Not intended for use in emission controlled vehicles.

from

$24.99

Mr. Gasket Performance exhaust gasket material is a heavy duty material, .062 inch thick, consisting of an acrylic binder system to resist high temperature. This material is made for sealing exhaust applications. Provides excellent sealing and durability.

Product Features:

Manufactured from high-temperature acrylic blend exhaust material
Provides excellent sealing and durability
Can be trimmed if necessary for modified port applications
For OE replacement, high performance street, drag race and oval track use
Resists Deteriorating
Provides Excellent Torque Retention

from

$42.99

Designed for ’69-’86 Chevrolet Small Block engines with long water pump
Kit includes two brackets and mounting hardware
Triple chrome plated
Manufactured with high quality materials

from

$43.49

Made of high quality stainless steel. These bolts will brighten up your hot rod, or improve the looks of your race car.

Product Features:

Bright Ball Burnish Finish
Made From 304 Stainless
Compact Hex Head Is Ideal Where Space Is Limited
12 Per Set
Resist corrosion and provides a clean professional appearance

from

$35.99

Manufactured from high-temperature composite exhaust material. Provides maximum torque retention to eliminate gasket failure. Can be trimmed if necessary for modified port applications. Precision die cut for an excellent fit. For OE replacement, high-performance street, drag race and oval track.

Product Features:

High-Temperature Exhaust Material
Withstands Extreme Exhaust Heat
Provides Excellent Sealing And Durability
Superior Tensile Strength
Resists Deteriorating
Provides Excellent Torque Retention

from

$44.49

Manufactured from high-temperature steel core/graphite faced exhaust material
Expanded steel core provides stability and maximum torque retention to eliminate gasket failure
Graphite impregnated facing provides excellent heat resistance and thermal conductivity to transfer heat away from the cylinder head
Conforms to and seals minor surface irregularities
Can be trimmed if necessary for modified port applications
For OE replacement, high performance street, drag race and oval track use
Anti-Stick Properties
Easy Removal For Disassembly

from

$38.99

Manufactured from high-temperature steel core/graphite faced exhaust material
Expanded steel core provides stability and maximum torque retention to eliminate gasket failure
Graphite impregnated facing provides excellent heat resistance and thermal conductivity to transfer heat away from the cylinder head
Conforms to and seals minor surface irregularities
Can be trimmed if necessary for modified port applications
For OE replacement, high performance street, drag race and oval track use
Anti-Stick Properties
Easy Removal For Disassembly

from

$26.99

A high-density non-asbestos fiber/metal core composite material consisting of two graphite coated, heat resistant fiber blended sheets that are mechanically and chemically fused to an expanded steel core. The finished product provides high heat resistance, excellent load retention and unmatched sealing performance on exhaust manifold and header applications. A 50% recovery rate allows for gasket expansion in the event your header loses the proper header bolt torque. Gasket futures a 1.50″x 1.50″ port size.

Product Features:

Designed To Match Port Openings Of Cylinder Heads
Excellent Free-Flowing Seal

from

$20.49

Gaskets

from

$95.99

gasket will not because the “Dead Soft” aluminum conforms to create a leak-proof seal. REAL-SEALS can also be easily trimmed for port-matching and

Product Features:

Multi-Layer “Dead Soft” aluminum conforms to create a leak-proof seal
Water/Weather Resistant
Re-Useable
Will Not Burn Or Blow Out
Suitable For Port-Matching
Made In USA

from

$51.99

Manufactured from high-temperature steel core/graphite faced exhaust material
Expanded steel core provides stability and maximum torque retention to eliminate gasket failure
Graphite impregnated facing provides excellent heat resistance and thermal conductivity to transfer heat away from the cylinder head
Conforms to and seals minor surface irregularities
Can be trimmed if necessary for modified port applications
For OE replacement, high performance street, drag race and oval track use
Anti-Stick Properties
Easy Removal For Disassembly

from

$44.49

Manufactured from high-temperature steel core/graphite faced exhaust material
Expanded steel core provides stability and maximum torque retention to eliminate gasket failure
Graphite impregnated facing provides excellent heat resistance and thermal conductivity to transfer heat away from the cylinder head
Conforms to and seals minor surface irregularities
Can be trimmed if necessary for modified port applications
For OE replacement, high performance street, drag race and oval track use
Anti-Stick Properties
Easy Removal For Disassembly

from

$35.99

Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:

Performance exhaust header gasket consisting of a high-density fiber facing material attached to both sides of a perforated steel core.
Resists blowout and burnout from high-temperature exhaust and is far stronger than basic paper gaskets.
Anti-stick coating permits motion without damaging the gasket and makes it easier to remove the gasket for future engine service.
Slotted bolt holes allow for easier header installation.
Not intended for use in emission controlled vehicles.

Top Picks for 1978 GMC G25 Performance Distributors

Upgrade GMC G25s with top-quality Performance Distributors parts, including 7 OEM and aftermarket selections for your 1978 model.

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from

$47.49

ACCEL cap and rotor kits offer superior protection from “arc-thru” and crossfire. Features 60k V-rated alkyd compound, stress-relieved at molding to ensure stability. Brass inserts and steel rotor springs provide for high spark energy flow.

Product Features:

Features Protection From Arc Thru And Crossfire
Features 60k V Rated Alkyd Compound
Brass Terminals Inserts And Steel Rotor Springs
High Spark Energy Flow

from

$14.79

For Chevrolet HEI Style distributors.

Product Features:

For HEI Distributors
Resist carbon tracking
Low resistance brass
Max voltage transfer
Molded from insulated material

from

$60.99

MSD Ignition has put a great deal of effort into researching and testing a variety of metallurgical compositions, heat treating and coatings to provide you with a durable, accurate and strong distributor gear. MSD engineers have built test fixtures and spent hundreds of hours testing and evaluating the metallurgy of our gears. The result is a special iron alloy gear that is treated to a low-friction coating process. To you this means long life, an easy break-in period and reliable performance.

Product Features:

Increased outer hardened layer thickness (RC 55-60).
Micro polished surface for smooth contact.
Proprietary formulated ductile iron.
Melonite QPQ coated reduces friction and initial wear.
Interstitial carbide concentration improves wear resistance and

from

$17.49

ACCEL Hi-Performance rotors offer superior protection from arc-thru and crossfire. Features hi-performance 60,000 volt alkyd compound, stress-relieved at molding to ensure stability and resist centrifugal forces at high racing RPMs.

Product Features:

Max stability for all RPM ranges
Heavy duty for maximum energy transfer

from

$665.99

Note: The PN 8365 is designed to replace GM HEI Distributors that use a 4-pin ignition module.

Product Features:

A complete performance HEI distributor upgrade for Chevy V8 engines
áA complete performance HEI distributor upgrade for Chevy V8 engines
Supplied with brass terminal distributor cap and rotor
Full spark energy output to 9,000 RPM
Supplied with a 8.5 amp, single spark, inductive discharge ignition module, MSD PN 83647, and MSD HEI Coil, PN 8225
Special oil tract improves lubrication to the distributor and cam gear
Nylon pads ensure smooth operation of the advance weights
Advance weight pins are staked and tig welded to the plate
Mechanical advance assembly can easily be locked out
Advance plate and weights are fine blanked from chrome moly steel and QPQ coated for friction reduction
Polished steel shaft is QPQ coated and guided by a sealed ball bearing
CNC machined billet aluminum housing and billet aluminum base
Vacuum advance canister for improved economy (can be locked out)
Easy-to-adjust mechanical advance with supplied springs and stop bushings
CARB E.O. Approved

from

$511.99

A factory-style ignition module is supplied with the distributor so your factory wiring will plug directly in. Triggering this module is the responsibility of a high output magnetic pick-up. Topping it all off is a heavy-duty rotor and a red MSD cap with brass terminals to ensure full spark delivery. For late model engine swaps or bolt-on strength, this distributor is the answer.

Product Features:

Drop-in billet replacement for GM distributors with the small cap and external coil
Factory style ignition module accepts factory wiring
CNC machined billet aluminum housing and billet aluminum base
Magnetic pickup and precision reluctor create stable trigger signals throughout the rpm range
áMagnetic pickup and precision reluctor create stable trigger signals throughout the rpm range
Oversized steel shaft is QPQ coated and guided by a sealed ball bearing and an extra long sintered bushing
áOversized steel shaft is QPQ coated and guided by a sealed ball bearing and an extra long sintered bushing
Special oil tract improves lubrication to the distributor and cam gear
O-ring seals can be added to modified blocks to improve oil pressure control
Supplied with late model distributor cap and rotor
Legal to install in all 50 states
Marine UL Certified

from

$30.99

Fits Chevy small block and big block engines with 0.491″ shaft. Replacement component.

Product Features:

Engine Distributor Gear
Made from Steel
Made from Steel
Fits .491″ Diameter Shaft
For Chevy V8 Engine Distributors
Fits .491″ Diameter Shaft
PROFORM Parts Brand Product
100% New Components; Not Re-man or Refurbished
Roll Pin Not Included
PROFORM Parts Brand Product

In-Demand Performance Fuel Systems for 1978 GMC G25s

Select from 13 premium Performance Fuel Systems parts for your 1978 GMC G25, with prices ranging from $13.99 to $819.99.

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from

$13.99

Small block Chevrolet, use for mounting mechanical fuel pumps
Includes mounting plate gasket
Includes chrome mounting bolts with washers
Triple chrome plated

from

$509.99

Holley’s new 0-80457SA is constructed from aluminum which compared to its zinc counterpart equates to a weight savings of 40%! Holley’s aluminum 0-80457SA will hold its shine longer and also can be hand polished for a custom look! Its 600 CFM of airflow,

Product Features:

Vibratory Polished For Good Looks

from

$474.99

Edelbrock products offer improved performance and aesthetics for a broad array of vehicles and engines. ‘Proven performance’ is the philosophy by which Edelbrock was founded and it continues to this day with the highest standards for performance and quali
Manual Choke
4 Barrel Count
Square Bore
Smooth Secondary Transition
Both Timed and Full Vacuum Ports
Includes PCV Outlet

from

$716.99

Square flange bolt pattern. Performance calibrated. The ultimate vacuum secondary street performance upgrade.

Product Features:

Vibratory Polished For Good Looks
Optimized Street Calibration That Works Out Of The Box
Factory Preset Electric Choke For Easy Startups
Quick Change Vacuum Housing Cap To Tune For Performance/Fuel Econ
No Unnecessary Trips Back To The Parts Store
Limited Lifetime Warranty
100% Wet Flow Tested By Holley Technicians
Arrives Ready To Run

from

$165.99

Mechanical fuel pump made from heavy duty construction for continuous high RPM operation. Fuel body casting can be rotated to accommodate various plumbing situations. Fuel pressure regulator is not required.

Product Features:

High Output Fuel Flow
Flows 110 gph Free Flow
Shutoff Pressure Pre-Set From 6.5 To 8 PSI
Fuel Pressure Regulator Is Not Required
Heavy Duty Construction For Continuous High rpm Operation
Fuel Body Casting Can Be Rotated For Plumbing Situations
Inlet And Outlet Tapped For 3/8 in. NPT
Inlet/Outlet Tapped For 3/8 in. NPT

from

$699.99

Square flange bolt pattern. Performance calibrated. The ultimate vacuum secondary street performance upgrade.

Product Features:

Vibratory Polished For Good Looks
Optimized Street Calibration That Works Out Of The Box
Factory Preset Electric Choke For Easy Startups
Quick Change Vacuum Housing Cap To Tune For Performance/Fuel Econ
No Unnecessary Trips Back To The Parts Store
Limited Lifetime Warranty
100% Wet Flow Tested By Holley Technicians
Arrives Ready To Run

from

$539.99

One of the most widely used Holley carbs of all times -the 0-80508S! Its dual feed fuel inlets assure you get all the fuel you need and its 750 CFM of airflow makes it the perfect performance upgrade carb. Its vacuum secondaries and electric choke make it super easy to use on a wide range of vehicles. Don’t trust your performance to just anyone, Holley is the only modular carburetor company that has been in business for over 100 years and has powered every NASCAR champion since the 60’s.

Product Features:

Vibratory Polished For Good Looks

from

$437.99

The Edelbrock 9905 Remanufactured Performer Series 600 CFM manual choke carburetor is a precisely tuned, quality-built carburetor that can handle the rigors of daily driving while delivering consistent, reliable street performance from day to day. Several characteristics make the 9905 Remanufactured Performer Series 600 CFM manual choke carburetor an outstanding street performer. The first one is that metering rods are utilized to transition between circuits. The carburetor is unaffected by engine backfires, which means that there are no power valves to blow out, and the rods can be changed in seconds without carburetor removal or fuel draining. Secondly, the carburetor has the unique ability to “hold a tune”, so once it is tuned, the carburetor stay’s tuned. What this means to you is that compared to other carburetors, the performance remains consistent and the calibration stays unchanged. The lightweight all-aluminum body features a two-piece body that resists warping and is compatible with gasohol and blended fuels. The simple tub-type bowls and rear-pivot floats all contribute to a carburetor that’s reliable, user-friendly and is easily tunable for miles and miles of trouble-free operation.

from

$18.79

Ideal for mounting a stock original equipment pump. The mounting plate is precision cut to cover the stock fuel pump opening and is complete with gasket.

Product Features:

Chrome Plated Steel
Comes With Gasket

from

$819.99

The off-road truck avenger is designed specifically for off-road applications. The unique fuel metering block eliminates fuel spillover through the boosters at extreme angles allowing for 40 degree climbing, 30 degree side hill maneuvers and nose-down descents to avoid hesitations, stalling and flooding typically associated with carbs in an off road environment. The 470 CFM off-road truck avenger is the perfect carburetor for 4 cylinder, V-6, and inline 6 cylinder engines. Viton(R) is a registered trademark of DuPont Performance Elastomers.

Product Features:

Gold Dichromate Finish For Extreme Off Road Environments
Single Feed Fuel Inlet For Ease Of Installation
Optimized Off-Road Calibration That Works Out-Of-The-Box
Factory Preset Electric Choke For Easy Startups
Quick Change Vacuum Housing Cap To Tune For Performance/Fuel Econ
One Piece Off-Road Vent Tube Eliminates Fuel Spillover
Metering Block For Flood Free Op. 40 deg. Climb/30 deg. Side Hill
Limited Lifetime Warranty Defects In Material/Workmanship

from

$716.99

Square flange bolt pattern. Performance calibrated. The ultimate vacuum secondary street performance upgrade.

Product Features:

Vibratory Polished For Good Looks
Optimized Street Calibration That Works Out Of The Box
Factory Preset Electric Choke For Easy Startups
Quick Change Vacuum Housing Cap To Tune For Performance/Fuel Econ
No Unnecessary Trips Back To The Parts Store
Limited Lifetime Warranty
100% Wet-Flow Tested To Assure It Arrives Ready To Run
Street Ready; Out Of The Box

from

$565.99

The Edelbrock 1412 Performer Series 800 CFM manual choke carburetor is a precisely tuned, quality-built carburetor that can handle the rigors of daily driving while delivering consistent, reliable street performance from day to day. Several characteristics make the 1412 Performer Series 800 CFM manual choke carburetor an outstanding street performer. The first one is that metering rods are utilized to transition between circuits. The carburetor is unaffected by engine backfires, which means that there are no power valves to blow out, and the rods can be changed in seconds without carburetor removal or fuel draining. Secondly, the carburetor has the unique ability to “hold a tune”, so once it is tuned, the carburetor stay’s tuned. What this means to you is that compared to other carburetors, the performance remains consistent and the calibration stays unchanged. The lightweight all-aluminum body features a two-piece body that resists warping and is compatible with gasohol and blended fuels. The simple tub-type bowls and rear-pivot floats all contribute to a carburetor that’s reliable, user-friendly and is easily tunable for miles and miles of trouble-free operation. Dyno tests proved that the EPS 800 carb outperformed a Holley #3310 carb out-of-the-box by 26 ft-lbs. of torque and 22 hp on a small-block Chevy engine equipped with an Edelbrock Performer RPM power package

Product Features:

Edelbrock products offer improved performance and aesthetics for a broad array of vehicles and engines. ‘Proven performance’ is the philosophy by which Edelbrock was founded and it continues to this day with the highest standards for performance and quali
Manual Choke
4 Barrel Count
Square Bore
Smooth Secondary Transition
Both Timed and Full Vacuum Ports
Includes PCV Outlet
Can Easily Calibrate with Rods and Jets

from

$407.99

Burnished aluminum. GM/MAC- style throttle linkage. Electric choke installed from factory. Easy tuning with 2 piece design. Smooth secondary transition. Both timed for full vacuum ports. Includes PCV outlet.

Product Features:

Most Sold 1978 GMC G25 Performance Ignition Products

Explore our best-selling GMC parts for the 1978 G25 among 11 OEM and aftermarket options starting from $34.49.

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from

$102.99

Engineered for higher energy output resulting in quicker starting, improved idle quality, crisper throttle response and more high RPM power. Compatible with both original HEI ignition systems and later model computer controlled HEI systems. No need to remove or re-time distributor. Complete with simplified ground strap, mounting screws, silicone coil gasket and carbon contact brush / spring.

Product Features:

10-15% More Energy
Direct Plug In Replacement Direct OE Fit
Advanced Bobbin Technology
Highly Specialized Silicone Magnetic Steel Cores
Standard Motor Products SMP Dr-31
MSD 8225

from

$95.99

Requires a 1.4 ohms Ballast resistor, Loom resistor or internally resisted coil.

Product Features:

Service Part
No Moving Parts To Wear Out
Self Contained Unit
Can Drive OEM
Can Drive High Performance Ignition Coils

from

$64.99

7mm And 8mm High Gloss Silicone Jacket
450 F Rated Silicone Jacket
Stainless Steel Plug Terminals
RFI Suppression For Street Driven Applications
Custom-fit Universal And Import Coverage
High-strength Fiberglass Braid Construction
Pre And Post HEI Vehicles

from

$126.99

10-15% More Energy
Direct Plug In Replacement Direct OE Fit
Advanced Bobbin Technology
Highly Specialized Silicone Magnetic Steel Cores
Similar to Standard Motor Products SMP Dr-32
Long Life And Great Looks

from

$143.99

The MSD 8.5mm Super Conductor is the ultimate performance wire. Its extremely low-resistance combined with the ability to suppress Electro Magnetic Interference is a combination that defies the common laws of physics.

Product Features:

Less than 50 ohms per foot for superior spark
Ferro-magnetic impregnated core creates an effective EMI choke
Forty feet of conductor is wound into a single foot of wire for high EMI suppression
Conductor core features Dupont Kevlar material for increased tensile strength
Durable outer sleeve is a proprietary compound for resistance to high heat or abrasion
Proprietary compound sleeves for resistance to high heat/abrasion

from

$77.99

The Street Fire Spark Plug Wires feature a low resistance conductor that’s wrapped in a sleek and durable black sleeve.

Product Features:

Silicone boots protect against high exhaust temps
Kevlar core combination for great strength and durability
Heavy duty terminals for secure connection
8mm silicone and synthetic jacket resists heat and abrasion
500 Ohms/ft. Resistance For Improved Spark Delivery And Power
Silicone boots protect against high exhaust temps

from

$77.99

Fits Most Stock And Modified Distributors
Solid State Electronics
Dwell Control Circuit

from

$34.49

3-wire for ignition box.

Product Features:

Service Part
Makes Connections Quick And Easy

from

$499.99

The MSD Flying Magnet Crank Trigger uses four magnets secured in the aluminum trigger wheel that pass by a stationary non-magnetic pick-up to trigger the ignition. This “flying magnet” design produces accurate trigger signals and the non-magnetic pick-up cannot be falsely triggered. Each Flying Magnet Crank Trigger includes a two-piece mounting bracket for the non-magnetic pick-up that in most cases will work on either the passenger side or driver’s side of the engine (the SB Chrysler and SB Ford brackets mount on only one side). The CNC-machined aluminum bracket securely holds the pick-up in place and is slotted to provide a wide range of timing adjustments. Spacers are included so you can mount the bracket on engines with standard motor mounts or engines with a .25″ motor plate. These systems will trigger MSD 6, 7, and 8 Series Ignitions and all MSD Timing Accessories.

Product Features:

7″ Diameter
Absolutely the most accurate way to trigger the ignition.
The non-magnetic pickup cannot be false triggered.
Powerful magnets are embedded in a billet aluminum trigger wheel.
Kits feature special brackets and mounting hardware for a variety of engines.

from

$204.99

The Mallory Promaster Classic series ignition coil is designed to meet today’s specialized ignition requirements. This coil features a faster rise time and increased spark duration (compared to stock) to increase performance. It has a glass-filled polyester case and oil-filled construction to ensure a long life and no energy loss from arcing. This coil also offers excellent wire retention with a spark plug type secondary post, and brass contact terminals.

Product Features:

Classic good looks
High current / voltage output
Spark plug style terminal for excellent coil wire retention
Brass contact terminals
Mounting bracket included
Can be used on inductive and CD ignitions

from

$70.99

Stock style replacement modified HEI coil dust cover. Used on 8 cylinder vehicles only.

Product Features:

Externally mounted coil
Increases reliability
Increase performance
High quality plastic
Resist spark loss
Use brass conductors
Low resistance connections
No modifications

Top-Rated Performance and Racing Products Brands For Your 1978 GMC G25

Shop for the best-rated brands offering Performance and Racing Products and other products for your 1978 GMC G25s. Below you’ll find some of our best rated Performance and Racing Products from Richmond Gear, B & M, and Competition Cams, and more. Performance and Racing Products from these brands that fit a 1978 G25 start at just $83.99 and are rated as high as 4.4 stars. OEM and aftermarket Performance and Racing Products don’t get more top quality, durable, and affordable than from the brands below.

Popular Richmond Gear 1978 GMC G25 Performance and Racing Products

When it comes to maintaining or upgrading your 1978 GMC G25, using quality Performance and Racing Products is essential to ensure durability and a perfect fit. Richmond Gear ticks all of those boxes. We offer a wide selection of Richmond Gear Performance and Racing Products, specifically designed for the 1978 GMC G25. With over 3 Richmond Gear brand Performance and Racing Products in stock, you’re sure to find what you need. The prices for these top-notch parts start as low as $350.99, with an average price of just $354.32. Plus, with over 10 customer reviews and an average rating of 4.4 stars, you can trust that our Richmond Gear Performance and Racing Products will get the job done right. Choose Advance Auto Parts for reliability, quality, and expert-approved parts that keep your vehicle running strong.

from $350.99

(2)

Differential Ring And Pinion

“I have a Chevy Impala 07 that runs on 3 cylinders when not needing the power of 6, and the new plugs have significantly provided an inexpensive tuneup”

from $350.99

(7)

Differential Ring And Pinion

“Great spark plugs.”

from $360.99

(1)

Differential Ring And Pinion

“Best ever!!!’nn”

Popular B & M 1978 GMC G25 Performance and Racing Products

B & M auto parts is one of the highest quality Performance and Racing Product brands in the market. Any 1978 GMC G25 owner should feel confident when installing genuine B & M parts in their vehicle. To ensure the best fit and performance for your 1978 G25, Advance Auto Parts carries a full inventory of 3 B & M Performance and Racing Products. Plus you will be keeping your GMC in peak condition while saving money because prices on these B & M Performance and Racing Products range from $382.99 to $562.99, plus, with more than 3 customer reviews and an impressive 4.3 stars average rating, you can be confident the Fram Performance and Racing Products below will deliver on both quality and value.

from $562.99

(1)

Tork Master 3000

“good parts and very strong”

from $539.99

(1)

Automatic Shifter – Megashifter – Universal

“its was pretty easy to install if u have any type of knowlegde of cars it should not be difficult at all and the shifting is awesome just be careful w”

from $382.99

(1)

Tork Master 2400

“The B&M 2400 stall converter was a great choice for my application. It works well on the street and track, increased performance by leaps and bounds. ”

FAQs for 1978 GMC G25 Performance and Racing Products

Which Performance and Racing Products are best-sellers for 1978 GMC G25s?

Out of 231 Performance and Racing Products that fit 1978 GMC G25s, the following parts are the top sellers:

8Mm Super Stock Graphite Cust (6900119) – $64.99
Performer EPS Intake Manifold for 1955-86 Small-Block Chevy (17340006) – $195.99
High Performance Thermostat – 160 Degree Brass & Copper (17360031) – $29.99

What’s the price range for 1978 GMC G25 Performance and Racing Products?

Performance and Racing Product prices for the 1978 GMC G25 start at $7.99 and go up to $1,201.99 for the most premium parts.

What’s the average price of a Performance and Racing Product for a 1978 GMC G25?

The average price for Performance and Racing Products for the 1978 GMC G25 is $255.85. Keep in mind the variety of part types within our Performance and Racing Product category so you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Performance and Racing Products for other GMC G25 model years?

Yes, we currently carry Performance and Racing Products for 3 model years of GMC G25s between 1968 and 1977. Performance and Racing Products are bought most frequently for the following model years: 1977, 1976, 1975, and 1968.

What are the cheapest Performance and Racing Products for my 1978 GMC G25?

The cheapest 1978 GMC G25 Performance and Racing Products we carry in stock are:

High Energy 7.794" Long, 5/16" Diameter Pushrod (50289688) – $7.99
Valve Cover Clamps SB (22905476) – $9.99
Bolt Kit Intake Hex Head (22905656) – $10.99
Sbc Fuel Mounting Plate With Bolts (22905345) – $13.99
Rotor – GM HEI (17350190) – $14.79

What are the top-rated Performance and Racing Products that fit the 1978 GMC G25?

Out of 1,738 reviews by customers, our 1978 GMC G25 Performance and Racing Products have an average customer rating of . These are some of the highest-rated Performance and Racing Product types for the 1978 GMC G25 and their top-rated products:

Performance Drivetrains
- Differential Ring And Pinion (10584362) – $350.99
- Differential Ring And Pinion (10584345) – $360.99
- Differential Ring And Pinion (10584364) – $350.99
Performance Shifters
- Differential Ring And Pinion (10584362) – $350.99
- Differential Ring And Pinion (10584345) – $360.99
- Differential Ring And Pinion (10584364) – $350.99

What types of Performance and Racing Products do you sell for my 1978 GMC G25?

As of 6/2/26, these are some of the most in-demand types of Performance and Racing Products for a 1978 GMC G25:

Can I get help with 1978 GMC G25 Performance and Racing Product orders?

Contact our customer support team, by chat or phone, through the help desk page, where you can find instant answers about GMC Performance and Racing Products and more.

What is your return policy for GMC G25 Performance and Racing Products?

Advance Auto Parts keeps returns simple. For new GMC G25 Performance and Racing Products and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.

1978 GMC G25 Performance and Racing Products

Mr. Gasket – Ultra Seal: Intake Gasket (Part No.5817)

Mr. Gasket – Cam Bolt Lock Plate Kit (Part No.948G)

Edelbrock – Performer 1407 Carburetor: 750 CFM, 4 Barrel, Square Bore, Manual Choke Inlet (Part No.1407)

Edelbrock – RPM Small-Block Chevy Cylinder Head SBC 70cc Hydraulic Flat Tappet Cam (Part No.60759)

Competition Cams – Mutha Thumpr 235/249 Hydraulic Roller Cam/Lifter Kit (Part No.CL11-601-8)

Competition Cams – Xtreme Energy 206/212 Hydraulic Flat Cam (Part No.11-230-3)

Accel – Supercoil (Part No.140001)

B & M – Holeshot 3600 (Part No.20425)

Accel – High Performance Ignition Module For Gm Hei Distributors (Part No.35361)

Spectre – Valve Cover Clamps SB (Part No.5321)

Competition Cams – Magnum 8.280" and 9.250" Long, .080" Wall, 3/8" Diameter Pushrod Set (Part No.7154-16)

Mr. Gasket – Engine Dress-Up Kit (Part No.9834BP)

Proform – HEI Distributor Steel Gear, Fits Chevy Small & Big Block V8 Engines w/ 0.491" Shaft (Part No.66961C)

MSD Ignition – Crank Trigger Kit, Flying Magnet, Big Block Chevy (Part No.8620)

Mr. Gasket – Ultra Seal: Exhaust Gasket Set (Part No.5904)

Mr. Gasket – Head Gasket (Part No.1134G)

Richmond Gear – Differential Ring And Pinion (Part No.49-0017-1)

Spectre – Alternator Bracket Kit 69-86 Chevy (Part No.47293)

B & M – Transpak For 65-87 TH400 Transmission (Part No.20228)

Spectre – Sbc Fuel Mounting Plate With Bolts (Part No.42493)

Accel – 8Mm Super Stock Graphite Cust (Part No.4048)

FEL-PRO Performance – Engine Crankshaft Seal Kit (Part No.2918)

Hays – Flywheel: Chev 40Lb Steel (Part No.10-140)

Mr. Gasket – Differential Cover Kit (Part No.9895)

Mr. Gasket – Chrome Plated Pulley Set (Part No.4963)

Mr. Gasket – Alternator: Remanufactured, 80 Amps (Part No.5122)

Edelbrock – Sure Seat Valve Springs for Chevy 262-400 V8 1957-95 (Part No.5802)

Edelbrock – Complete Sure Seat Valve Spring Kit for Chevy 262-400 V8 1957-95 (Part No.5794)

Edelbrock – Performer EPS Intake Manifold for 1955-86 Small-Block Chevy (Part No.2701)

FEL-PRO Performance – Cylinder Head Gasket: Multi-Layered Steel, Without Head Bolts (Part No.1003)

FEL-PRO Performance – Cylinder Head Gasket: Steel Core Composite, Without Head Bolts (Part No.1004)

FEL-PRO Performance – Engine Valve Cover Gasket Set (Part No.1603)

Edelbrock – Performer Intake Manifold for 1987-95 Small Block Chevy, Satin Finish (Part No.2104)

Edelbrock – Performer Intake Manifold for 1955-86 Small-Block Chevy, Satin Finish (Part No.2101)

Competition Cams – Valve Seals, O-Ring 11/32" 1 St (Part No.501-16)

Edelbrock – Sure Seat Valve Springs for Chevy 262-400 V8 1957-95 (Part No.5802)

Mr. Gasket – Cam Bolt Lock Plate Kit (Part No.948G)

Competition Cams – MAGNUM ROLLER ROCKERS, SMALL BLOCK CHEVY 1.52 1 ST (Part No.1412-16)

Competition Cams – TIMING SET, HIGH TECH SMALL BLOCK CHEVY 1 EA (Part No.3100)

Edelbrock – Complete Sure Seat Valve Spring Kit for Chevy 262-400 V8 1957-95 (Part No.5794)

Competition Cams – High Energy Timing Set (Part No.3200)

FEL-PRO Performance – PERFORMANCE VALVE COVER GASKET SET (Part No.1602)

Edelbrock – Intake Manifold Gasket for 1958-1986 E-Tec 200 Small-Block Chevy (Part No.7215)

B & M – Tork Master 3000 (Part No.20402)

B & M – Tork Master 2400 (Part No.20404)

Edelbrock – Performer-Plus Camshaft Kit for 1957-86 Small-Block Chevrolet (Part No.2103)

Mr. Gasket – Ultra-Seal Intake Manifold Gasket with Silicone Beading (Part No.5821)

Mr. Gasket – Ultra Seal: Harmonic Balancer Bolt/Washer Kit (Part No.945G)

Mr. Gasket – Premium Quality Thermostat Gasket with Solid Aluminum Carrier (Part No.738G)

Spectre – W3 Engine Kit Sb Chevy (Part No.54083)

Mr. Gasket – High Performance 180 Degree Thermostat for Increased Flow (Part No.4364)

Mr. Gasket – High Performance Thermostat – 160 Degree Brass & Copper (Part No.4363)

FEL-PRO Performance – Perforated Steel Core with Anti-Stick Coating Exhaust Manifold Gasket Set (Part No.1444)

Mr. Gasket – Performance Exhaust Gasket Set For Enhanced Sealing And Durability (Part No.150B)

Spectre – Alternator Bracket Kit 69-86 Chevy (Part No.47293)

Mr. Gasket – Header Bolt Set (Part No.2210G)

Mr. Gasket – Exhaust Gasket Set (Part No.150)

Mr. Gasket – Ultra Seal: Exhaust Gasket Set (Part No.5904)

Mr. Gasket – Ultra Seal: Exhaust Gasket Set (Part No.5900)

Edelbrock – Exhaust Manifold Gasket Set for 1958-86 Small Block Chevrolet (Part No.7204)

Flowtech – Gaskets (Part No.99161FLT)

Flowtech – Header Gaskets – Aluminum-Layered (Part No.99150FLT)

Mr. Gasket – Ultra-Seal Exhaust Gaskets – Hi-Temp Graphite – Small Block Chevy Oval Port – 1.50"W X 1.82"H (Part No.5917)

Mr. Gasket – Ultra Seal: Exhaust Gasket Set (Part No.5903)

FEL-PRO Performance – Exhaust Manifold Gasket Set (Part No.1448)

Accel – HEI Distributor Cap & Rotor Kit with Arc-Thru Protection (Part No.8122)

MSD Ignition – Rotor – GM HEI (Part No.8410)

MSD Ignition – Distributor Gear, Chevy Distributor, 0.500" ID, Iron (Part No.8531)

Accel – Ignition/Electrical (Part No.130120)

MSD Ignition – Distributor, Billet, GM HEI (Part No.8365)

MSD Ignition – Distributor, Late-Model GM HEI V8, External Coil (Part No.8366)

Proform – HEI Distributor Steel Gear, Fits Chevy Small & Big Block V8 Engines w/ 0.491" Shaft (Part No.66961C)

Spectre – Sbc Fuel Mounting Plate With Bolts (Part No.42493)

Holley – Street Carburetor: 600 CFM, Electric Choke, 4 Barrel, Square Bore, Single Inlet, Shiny (Part No.0-80457S)

Edelbrock – Performer 1407 Carburetor: 750 CFM, 4 Barrel, Square Bore, Manual Choke Inlet (Part No.1407)

Holley – Prem Street Carbs (Avengers) (Part No.0-80770)

Holley – High Output Mechanical Fuel Pump – 110 GPH Free Flow (Part No.12-327-11)

Holley – Street Carburetor: 670 CFM, Electric Choke, 4 Barrel, Square Bore, Dual Inlet, Shiny (Part No.0-80670)

Holley – Street Carbs (Part No.0-80508S)