1978 GMC C25 Performance and Racing Products

Essential 1978 GMC C25 Performance and Racing Products

Mr. Gasket – Ultra Seal: Competition Screw-In Rocker Arm Studs (Part No.1074)

Ultra Seal: Competition Screw-In Rocker Arm Studs

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$85.09
Mr. Gasket competition screw-in rocker arm studs are manufactured from heat treated black oxide coated Grade 8 steel. Ideal for high performance street and race applications.

Product Features:
  • Black Oxide Coated Grade 8 Steel
  • Kit Contains 16 Studs
  • Easy To Install
  • Heat Treated Steel
  • Prevents Stud Flexing
  • Black Plated Finish
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Holley – Street Carburetor: 670 CFM, Electric Choke, 4 Barrel, Square Bore, Dual Inlet, Shiny (Part No.0-80670)

Street Carburetor: 670 CFM, Electric Choke, 4 Barrel, Square Bore, Dual Inlet, Shiny

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$620.99
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
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Accel – Cap/Rotor (Part No.8129)

Cap/Rotor

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$60.99
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:
  • See catalog for application information
  • Features 60K V Rated Alkyd Compound
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K&N – Engine Air Filter: Washable Filter, Increase Horsepower & Acceleration (Part No.E-1120)

Engine Air Filter: Washable Filter, Increase Horsepower & Acceleration

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$149.99
K&N performance High-Flow Air Filters are engineered to improve engine performance. Unlike disposable paper filters which must be frequently replaced, K&N Air Filters are washable, reusable, and engineered to last for the life of your vehicle or outdoor power small engine. Engineered to fit easily into your factory air box, installation can be completed in a matter of minutes! K&N develops and tests each product on the world┐s toughest race tracks, so we can bring the highest level of performance to your daily driving. Join the millions of customers who have saved money and improved vehicle performance by upgrading to K&N filtration.

Product Features:
  • ENGINEERED POWER: State-of-the-art air filter media is designed to increase horsepower and acceleration as well as improve overall engine performance
  • RUGGED CONSTRUCTION: K&N Air Filters are manufactured with durable, premium materials and state-of-the-art construction methods to last a lifetime
  • 4 LAYERS OF PROTECTION: Multiple layers of premium cotton gauze treated with a specially-designed tacking agent work together to create an intricate mesh of engine filter media that is designed to block and trap harmful contaminants
  • CLEAN ONCE EVERY 5 YEARS: Engine air filter only needs cleaning every 75,000 miles under normal highway driving conditions (based on the average miles driven per year of 15,000 miles)
  • ULTIMATE LONGEVITY: No-hassle lifetime warranty on stock replacement K&N air filters- limitations apply
  • EASY INSTALLATION: K&N Air Filters are pre-treated and ready to drop into your factory air box- they are one of the easiest and most cost-effective vehicle upgrades for quick performance gains
  • ECO-FRIENDLY: Using a washable, reusable engine air filter helps reduce replacement air filter waste- a K&N air filter is designed to last longer than 10 or more disposable filters
  • MADE IN USA: K&N Air Filters are proudly made in the USA for trusted quality & reliability
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Mr. Gasket – Super Intake Manifold Bolts (Part No.6080)

Super Intake Manifold Bolts

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$27.49
These grade 5 hex head bolts are black coated plated for protection and appearance. Hardened flat washers provide uniform torque and prevent galling on aluminum manifolds.

Product Features:
  • Assures Accurate Torque App
  • Prevents Galling Manifold
  • Grade 5 Material
  • Black Oxide Coasted
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MSD Ignition – Distributor; Billet GM HEI (Part No.8365)

Distributor; Billet GM HEI

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$594.99
The Chevrolet HEI distributor is a favorite for muscle cars, street rods and even circle track racers. The integrated coil keeps under mount wiring clean, and for race cars, the idea of running one wire to the distributor keeps things simple. However, when it comes to performance, the stock HEI falls short. MSD answers the need for a strong, accurate and high performance HEI with our Pro-Billet HEI. The distributor is supplied with our digital HEI module and coil so there is plenty of spark energy combined with improved dwell and timing control. Tig welded on top of the distributor shaft is MSD’s adjustable centrifugal advance assembly. Three sets of springs and four stop bushings let you dial in up to 24 different timing curves to match your driving needs. Plus, there’s a vacuum advance for those concerned with economy. All of this is assembled around a precision and great looking CNC machined housing.

Product Features:
  • Complete performance HEI distributor upgrade for Chevy V8 engines
  • Supplied w/Brass Terminal Distributor Cap And Rotor
  • Full Spark Energy Output To 9000 Rpm
  • An 8.5 amp; single spark; inductive discharge ignition module
  • Includes MSD PN[83647] and MSD HEI Coil PN[8225]
  • Special oil tract improves lubrication to the dist./cam gear
  • Nylon pads ensure smooth operation of the advance weights
  • Advance weight pins are staked and tig welded to the plate
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MSD Ignition – Wire Set; Street Fire; Multi-Angle plug; HEI; Universal (Part No.5550)

Wire Set; Street Fire; Multi-Angle plug; HEI; Universal

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$72.39
The street fire spark plug wires feature a low resistance conductor that’s wrapped in a sleek and durable black sleeve. The terminals are covered in black boots that protect the conductor from engine heat to ensure spark delivery.

Product Features:
  • Helically wound conductor suppresses electro and radio noise
  • 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
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Mr. Gasket – Lts Throttle Cable Brkt Chev (Part No.9885)

Lts Throttle Cable Brkt Chev

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$14.99
The throttle cable bracket is designed for small block Chevy engines thru 1979 and is to be used in conjunction with the kick down cable Pn9886 for the Turbo 350 transmission. The throttle cable bracket mounts on the intake manifold and will hold cables with round or square mounts. It has a 2 inch adjustable range and is finished off in a beautiful chrome plating.

Product Features:
  • 2 in. adjustable range
  • Includes necessary hardware
  • Chrome plated
  • Individually packaged
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Competition Cams – Magnum 253/253 Hydraulic Flat Cam and Lifter Kit for Chevrolet Big Block 396-454 (Part No.CL11-214-4)

Magnum 253/253 Hydraulic Flat Cam and Lifter Kit for Chevrolet Big Block 396-454

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$376.99
An older member of the COMP Cams grind family, the Magnum series of camshafts offers excellent performance gains over stock without the added wear and tear associated with more aggressive camshafts. Ideal for use with higher compression ratio engines that

Product Features:
  • Best with aftermarket torque converters and 9.5:1 compression.
  • Great high RPM power.
  • Easy on valve train parts.
  • Can be used with mild ratio rocker arms and traditional performance valve springs.
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Hooker Headers – Super Comp. Header (Part No.2841HKR)

Super Comp. Header

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$893.99
Hooker has a complete line of engine swap headers, front frame mounts and transmission mounts for popular engine swaps. Available for Chevy, Chrysler and Ford small block and big block engines. Hooker swap headers and mounts are designed to provide an exact fit when used together. Hooker swap headers add the extra horsepower and torque the serious enthusiast demands. Hooker Headers are the best single improvement you can make.

Product Features:
  • Long Tube Lengths
  • Long Transition Collectors
  • Monstrous Low-Mid Range Torque
  • Keep Top End Horsepower
  • Provides Finest Fit
  • Most Durable Design Available
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Mr. Gasket – Billet Style Aluminum Water Pump Pulley (Part No.5315)

Billet Style Aluminum Water Pump Pulley

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$103.99
The pulley is machined from aluminum and heat treated for strength. The satin finish is a more subtle alternative to chrome and offers a hi-tech look. Compliments crankshaft pulley #5317 or 5318.

Product Features:
  • Made from aluminum
  • Heat treated for strength
  • Satin finish for a more subtle hi-tech look than chrome
  • Matches crankshaft pulley #5317 or #5318
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Mr. Gasket – Thermocap Radiator Cap (Part No.2470R)

Thermocap Radiator Cap

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$48.09
The fastest, easiest way to know exactly when it’s safe to open your radiator cap. ThermoCap, with its built-in calibrated thermometer, indicates the coolant temperature.

Product Features:
  • Indicates coolant temperature
  • Helps prevent coolant injuries
  • Fahrenheit and centigrade readings
  • Color-coded temperature ranges
  • Integrated coolant reclamation valve
  • Improves under-hood appearance
  • Chromed crown with a colored trim ring
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MSD Ignition – Rotor; Extreme Output; GM HEI (Part No.84101)

Rotor; Extreme Output; GM HEI

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$30.19
With the introduction of our 20 Amp extreme HEI module, we needed an HEI cap and rotor that could withstand the high output. The answer was to mold our own HEI cap, rotor and coil cover. The cap and rotor will fit our HEI Pro-Billet distributor, PN 8365, plus will work on stock applications.

Product Features:
  • Extreme output rotor
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Hays – Power Train (Part No.85-103)

Power Train

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$530.99
High burst strength woven lining to withstand heat and higher engine RPM. Heavy-duty sprung hub assembly to allow smooth engagement and steady torque transfer without chatter. Recommended for high horsepower street vehicles in addition to occasional drag strip use.

Product Features:
  • Built As Matched Assembly
  • Exceptional Performance
  • Exceptional Durability
  • Long Term Dependability
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Lakewood – Trans Mount: Urethane-Chevy (Part No.24350)

Trans Mount: Urethane-Chevy

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$84.99
Constructed of durable polyurethane to handle the stress oh high horsepower. Absorbs vibration and lasts longer than rubber Features unique built-in safety lock to keep from separating under high torque loads. Ideal for use on street or strip applications. Complete with grade-8 mounting hardware.

Product Features:
  • Durable Polyurethane
  • Absorbs Vibration
  • Last Longer Than Rubber
  • Built-In Safety Lock
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Mr. Gasket – Intake Manifold Bolts (Part No.6091)

Intake Manifold Bolts

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$32.09
These special Grade 8 intake manifold bolts feature a 12-point smaller-than-standard head and flange, and include special extra thick flat washers for optimum clamping pressures. They’re ideal for use where space is minimal, typical on larger runner race manifolds. These bolts and washers are bright zinc plated for protection and good looks.

Product Features:
  • Features 12-point Smaller-than-standard Bolt Head
  • Thick Flat Washers Distribute Optimum Clamp Load
  • Ideal Use Where Space Is Minimal On Race Manifolds
  • Bolts And Washers Zinc Plated For Protection
  • Zinc Plated For Protection
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Spectre – Differential Cover (Part No.6080)

Differential Cover

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$59.99
Spectre’s Chrome GM Differential Covers feature a 14 bolt design and include the chrome bolts and gasket needed for an easy install. Made to OEM specifications these differential covers are triple chrome plated ensuring they perform as well as they look. This product fits the following vehicles with a 9.5 inch ring gear: 1981 and up Chevy/GMC (rear), 1973-1995 Chevy/GMC 3/4 ton-1 ton 2/4 wheel drive (rear). Includes 14 SAE standard chrome bolts for installation. You’ll need to supply your own bolts if your application requires metric bolts.

Product Features:
  • Fits the following vehicles with 9.5″ ring gear: ’81-up Chevy/GMC (rear), ’73-’95 Chevy/GMC 3/4-1 ton 2/4WD (rear)
  • Triple chrome plated
  • 14 bolt design cover
  • 14 chrome 5/16 inch -18 x 3/4 inch differential cover bolts included
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Powertrax – Lock Right Locker (Part No.1921-LR)

Lock Right Locker

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$368.99
The Powertrax Lock-Right ultra-strength alloy locker’s straight-line performance is equal to a solid spool, but automatically unlocks in turns. Best suited for extreme off-road to severe on-road use, Powertrax Lock Right lockers replace the spider gears in your open differential carrier using basic tools and without affecting your ring and pinion settings. The whole job can be done in your driveway in a couple of hours, pin included! Powertrax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Powertrax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds!The Powertrax® Lock-Right Locker provides outstanding traction for off-road machines and race vehicles. Powertrax No-Slip Traction Systems deliver excellent performance to street-driven cars and trucks.
  • Powertrax® lockers range from the original, Lock-Right for serious straight-line performance, to the No-Slip traction system for street-able vehicles.
  • Powertrax® offers three levels of GRIP locking differentials, ranging from the clutch-type GRIP LS with a forged steel case, the gear-driven GRIP PRO and finally the GRIP LOK for extreme traction.
  • Powertrax® = Extreme Traction Systems!
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    Mr. Gasket – Chrome Plated Engine Oil Pan (Part No.9779)

    Chrome Plated Engine Oil Pan

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    $153.99
    Beautifully chrome plated. Complete with drain plug, washer & bolts (stock depth). Chrome-plated dipsticks with tubes sold separately.

    Product Features:
    • Chrome plated
    • Includes drain plug/washer/bolts
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    Accel – High Energy Ignition Coil for GM HEI – 1973-1991 (Part No.140003)

    High Energy Ignition Coil for GM HEI - 1973-1991

    from

    $100.99
    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
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    Energy Suspension – Sway Bar Bushing Set (Part No.3.5177R)

    Sway Bar Bushing Set

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    $48.99
    Energy Suspension performance polyurethane sway bar bushings and end links offer the greatest improvement in performance among all the products Energy offers. They make a vehicle’s sway bar system much more effective like adding a larger, higher performance sway bar! Economy, increased efficiency, and easy installation are just some of the reasons these products are so popular. Made of Hyper-Flex polyurethane that lasts much longer than O.E.M. rubber bushings.

    Product Features:
    • Allows Sway Bar System to Work At 100% Efficiency
    • Zerk Type Fittings
    • Allows for Periodic Greasing
    • Lasts Much Longer Than OEM Rubber Bushings
    • Handling Characteristics Improve Dramatically
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    Richmond Gear – RngPnn (Part No.49-0280-1)

    RngPnn

    from

    $344.99
    RngPnn

    FEL-PRO Performance – PERFORMANCE OIL PAN GASKET SET (Part No.1884 R)

    PERFORMANCE OIL PAN GASKET SET

    from

    $64.99
    Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

    Product Features:
    • Rigid core, molded silicone rubber gaskets utilize the one-piece molded rubber technology for a perfect fit, ease of installation and include compression limiters to prevent overtightening.
    • Not intended for use in emission controlled vehicles.
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    Mr. Gasket – Distributor Hold-Down Clamp (Part No.1009)

    Distributor Hold-Down Clamp

    from

    $9.99
    Add sparkle to your engine with this chromed hold-down clamp. With bolt and gasket. Serrations on the bottom prevent distributor and magneto rotation for accurate timing.

    Product Features:
    • Rolled Edges For Strength
    • Ideal For Magnetos
    • Ideal For Ignition Distributor
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    Competition Cams – CAMSHAFT, SBC 249 XTREME ENERGY COMPUTER CONTROLLED HYDRAULIC 1 EA (Part No.12-249-4)

    CAMSHAFT, SBC 249 XTREME ENERGY COMPUTER CONTROLLED HYDRAULIC 1 EA

    from

    $276.99
    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, the Xtreme Energy grind family offers gains in torque and horsepower while still delivering adequate vacuum for power brakes and other vacuum dependent accessories. Xtreme Energy camshafts work great in carbureted applications, but offer the best performance with aftermarket intake manifolds, lower gear ratios, headers and free flowing exhaust.

    Product Features:
    • HYDRAULIC – Xtreme Energy Computer Controlled: Great in throttle body, crossfire or carbureted engine and 305 TPI.
    • 249/260 Advertised Duration, 206/212 Duration @ .050″, .434″/.444″ Lift, 112 Lobe Separation
    • 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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    Mr. Gasket – Rear Main Seal Gasket (Part No.1960)

    Rear Main Seal Gasket

    from

    $23.99
    This Mr. Gasket Rear Main Seal is made from silicone to allow the seal to handle extreme engine oil temperature. It also provides for an upgrade for that leaky rope style seal and is a direct replacement for a rubber main seal. It’s also injection molded for a precise fit.

    Product Features:
    • Repairs That Leaky Rear Main Sail
    • Silicone Rubber to Withstand Extreme Engine Oil Temperatures
    • Upgrade for Rope Seal Equipped Cars or Direct Replacement for Rubber Main Seal
    • Injection Molded for Precise Fit
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    Edelbrock – Performer Small-Block Chevy Cylinder Head 64cc Hydraulic Flat Tappet (Part No.60909)

    Performer Small-Block Chevy Cylinder Head 64cc Hydraulic Flat Tappet

    from

    $1009.99
    Product Features:
    • 50-State Street Legal Aluminum Cylinder Head
    • Out-of-the-Box Bolt-On Performance
    • 64cc Combustion Chambers Improve Performance
    • Retain Stock Compression Ratio
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    Mr. Gasket – Starter Motor Heat Shield (Part No.3678)

    Starter Motor Heat Shield

    from

    $43.99
    Fits Chevy small block 265-400 CID, Chevy big block 396-454 CID, & 90 degree Chevy V6. The Starter Motor Heat Shield is built with heat-resistant material sandwiched between two aluminum plates. The shield protects the starter from heat buildup from the exhaust system, especially important when using headers.

    Product Features:
    • Designed to prevent starter overheat due to extreme exhaust temperature
    • Heat resistant material sandwiched between 2 aluminum plates
    • Protects Starter From High Temperatures
    • Made Of 2 Sheets Of Aluminum Heat Resistant Center
    • Natural Finish
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    Popular 1978 GMC C25 Performance and Racing Products Categories

    1978 GMC C25 Performance and Racing Products

    You count on your 1978 GMC C25 to run right. That means taking care of it with regular maintenance, necessary repairs, and the right parts. Advance Auto Parts can help with all of that thanks to our extensive inventory of trusted Performance and Racing Products. With 290 Performance and Racing Products ranging in price from $7.99 to $1,009.99, you’re sure to find everything you need for your 1978 GMC C25.

    Brands matter. If you want to shop a specific Performance and Racing Products brand, we stock 24 different brands like Mr. Gasket, Edelbrock, and K&N. 1978 GMC C25 Performance and Racing Products start as low as $7.99!

    One of the best ways to find top quality OEM or aftermarket Performance and Racing Products is by asking professionals. Short of that, you can shop with confidence thanks to our 1,000 extensive product reviews on 1978 GMC C25 Performance and Racing Products. Some of the top-rated Performance and Racing Products products we carry are Distributor; Street Fire; Chevrolet V8 GM HEI with 4-Pin Module with 4.7 stars and Ultra-Seal Intake Manifold Gasket with Silicone Beading with 4.3 stars.

    Did we mention you can order your Performance and Racing Products from our online catalog and have them shipped right to your garage? Or, if you feel like seeing the parts first-hand, search for your nearest Advance Auto Parts location above and pick up in-store when you’re ready. Browse our full Performance and Racing Products inventory for your 1978 GMC C25 below to get started!

    Top-Rated Performance and Racing Products Brands For Your 1978 GMC C25

    Trusted Performance and Racing Products OEM and aftermarket product brands are what Advance Auto Parts specializes in. The brands we work with are sure to keep that 1978 GMC C25 running right for years to come. In our inventory you’ll find brands like Mr. Gasket, Edelbrock, K&N, and even more.

    Popular Flowtech Performance and Racing Products

    You’ll find popular Flowtech brand products across Performance Exhaust Products. All are waiting to get your 1978 GMC C25 back on the road. Some of the top-rated Flowtech products in these categories are:
    Real-Seal; Header Gasket
    from $85.39
    (1)
    Real-Seal; Header Gasket
    Performance Exhaust Manifold Gaskets

    Top-Rated Edelbrock Performance and Racing Products


    If Edelbrock are what you’re looking for, our inventory holds plenty. We stock Edelbrock brand Performance and Racing Products for your 1978 GMC C25, and some of our most reviewed Edelbrock parts include:
    Performer EPS Intake Manifold for 1955-86 Small-Block Chevy
    from $195.99
    (7)
    Performer EPS Intake Manifold for 1955-86 Small-Block Chevy
    Performance Intake Manifolds

    FAQs for 1978 GMC C25 Performance and Racing Products

    What are the most purchased Performance and Racing Products for the 1978 GMC C25?

    Out of 290 Performance and Racing Products for the 1978 GMC C25, the most popular in our inventory are:
    High Performance Transmission Mount for Street & Racing Vehicles
    from $41.99
    (17)
    High Performance Transmission Mount for Street & Racing Vehicles
    Performance Engine and Transmission Mounts
    High Performance 180 Degree Thermostat for Increased Flow
    from $26.99
    (20)
    High Performance 180 Degree Thermostat for Increased Flow
    Performance Engine Coolant Thermostats

    What are the top-rated 1978 GMC C25 Performance and Racing Products?

    Top-rated Performance and Racing Products for your 1978 GMC C25 based on customer reviews/ratings are:
    Distributor; Street Fire; Chevrolet V8 GM HEI with 4-Pin Module
    from $259.99
    (20)
    Distributor; Street Fire; Chevrolet V8 GM HEI with 4-Pin Module
    “Best Distributor I have ever bought, has made a big difference on my small block Chevy. Stronger spark, more powerful combination, which allows no mor”
    Ultra-Seal Intake Manifold Gasket with Silicone Beading
    from $31.99
    (18)
    Ultra-Seal Intake Manifold Gasket with Silicone Beading
    “Can’t go wrong with Mr Gasket”
    Performance Exhaust Gasket Set for Enhanced Sealing and Durability
    from $20.99
    (14)
    Performance Exhaust Gasket Set for Enhanced Sealing and Durability
    “Put new headers on motor”