1978 GMC K25 Performance Engines

Name: Water Neck
Brand: Mr. Gasket
SKU: 2557
Price: 27.49 USD

Find your specific 1978 GMC K25 original or aftermarket Performance Engines below. Order your parts online and have delivered to your home or pick up in-store at Advance Auto.

Essential 1978 GMC K25 Performance Engines

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$27.49

Precision die cast, these water necks are first polished to a high luster, then chrome plated. Features an O-ring style seal to prevent water leaks. Comes with O-ring gasket and mounting bolts.

Product Features:

Complete with o-rings and mounting bolts
Features an o-ring style seal to prevent water leaks
Chrome plated
1/2″ NPT port can be used for various coolant temp related sensors or switches

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$29.99

Mr. Gasket Performance Intake Gaskets are manufactured from cellulose/nitrile composition gasket material. This is a low density material that conforms well to irregular surfaces and has very good crush resistance at high flange pressures. They provide excellent sealing and durability as the material is designed for sealing gasoline, oils, water and coolant in applications up to 350 degrees Fahrenheit. While die-cut for an excellent fit, they can be trimmed if necessary for modified port applications. Comes complete with front & rear manifold end seals. For original equipment replacement, high performance street, drag race and oval track.

Product Features:

Manufactured from cellulose/nitrile composition gasket material
Provides excellent sealing and durability
Die-cut for an excellent fit
Can be trimmed if necessary for modified port applications
Complete with manifold end seals & distributor gaskets if applicable
For OE replacement, high performance street, drag race and oval track use

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$542.99

HYDRAULIC – Thumpr: High performance street, stock converter ok, best with 2000+ converter and gears. Choppy/thumping idle.

Product Features:

HYDRAULIC – Thumpr: High performance street, stock converter ok, best with 2000+ converter and gears. Choppy/thumping idle.
279/296 Advertised Duration, 227/241 Duration @ .050″, .498″/.483″ Lift, 107 Lobe Separation
Valve spring upgrade required

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$31.99

Edelbrock part #6998 Front Timing Cover Gasket set for Big-Block Chevy. Includes front cover gasket and front seal.

Product Features:

Includes replacement timing cover and water pump gaskets and the crank oil seal for big block Chevrolet engines
Features a tough, scuff-resistant silicone rubber coating
Helps in sealing without the engine warming up
Reduces fluid migration through the gasket
Resists fatigue

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$665.99

Nitrous Holeshot Converters are Built with the same features as the other B&M Holeshots, with the addition of anti-balloon plates. The anti-balloon plates will allow these converters to stand up to the instant horsepower nitrous delivers.

Product Features:

3400-3800 RPM
Small And Big Blocks
Serious Performance
Furnace Brazed
Fully Balanced

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$75.99

Finish your custom engine job with these show quality grade 5 chromed 12-point bolts, includes AN washers which have no exposed shoulder for a professional appearance. Includes (12) 3/8-16 x 1 inch bolts with (12) 3/8 inch AN washers.

Product Features:

Chrome plated
Grade 8
12-point head
AN washers with no exposed shoulder for a professional appearance

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$94.99

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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$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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$1322.99

BIG BLOCK CHEVY HYDRAULIC CAM AND LIFTER KIT – Big Mutha’ Thumpr: Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.

Product Features:

Cam and lifter kit for Big Block Chevy engines
CL-Kit includes cam, lifters, assembly lube, instructions and decals
HYDRAULIC – Big Mutha’ Thumpr: Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.
295/312 Advertised Duration, 243/257 Duration @ .050″, .522″/.507″ Lift, 107 Lobe Separation
Valve spring upgrade required

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$215.99

Weiand’s light weight, performance aluminum mechanical Action-Plus water pumps give a weight saving of 30 percent to 50 percent over stock cast-iron pumps. These pumps feature a premium quality bearing and seal that have twice the load capacity of stock pumps. Weiand’s exclusive housing counter bore keeps the bearing form walking out. All pumps are designed with the necessary bracket bosses and water connections to fit popular street applications.

Product Features:

Twisted Snout Water Pump Design For Updated Style
Street Performance
Heavy Duty Shaft w/5/8 in. Pilot
Six-Blade Stamped Steel
Anti-Cavitation Impeller
100 Percent Leak Tested

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$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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$74.99

Product Features:

Solid Bushing Chain Resists Stretching
For Use with Stock or Edelbrock Camshafts
Stressproof Steel Crank Gears
3 Keyway Setting Points To Ensure Accurate Timing
True Bearing Surface Rolls with the Sprockets

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$128.99

Product Features:

Provides excellent sealing and conformability
Releases+N747 clean without sticking, if the engine needs to be disassembled
Perfect companion for Edelbrock cylinder heads and intake manifolds
Does not include end seals
Use of a silicone sealant in place of end seal is recommended

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$73.99

These grade 8 alloy steel, longer length bolts are designed to compensate for thread length lost when using head bolt washers. This allows increased torque and clamping. Set of 16 does one cylinder head.

Product Features:

Cylinder Head Bolts
Longer-Than-Stock
High Quality Grade 8 Alloy
Increase Torque Settings
Higher Clamp Loads On Gasket

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$189.99

Product Features:

Case-Hardened Tubing
Welded Ends
5/16 in. Diameter
Use with or without Hardened Steel Guideplates

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$17.79

Big Block Chevrolet tubular head dowel, .638/.639 inch o.d. (outer diameter) by 1/2 inch. Packaged two per set. These hard to find dowel pins are precision machined then case hardened for accurate alignment in engine assembly.

Product Features:

Precision Machined
Case Hardened
Give Accurate Alignment
2 Per Set

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$80.99

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 black oxide coated. 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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$253.99

Product Features:

Non-Rotator
1.500 in. Outside Diameter
1.082 in. Inside Diameter
1.340 in. Coil Blind
Set of 16

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$26.99

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

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$25.49

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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$22.49

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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$99.99

Product Features:

Use W/ Valve Springs Part #5703, 5794
Set of 16
1.50 in. Outside Diameter
Steel Material
Black Oxide Finish

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$95.99

Valve spring retainers for use OE cast iron heads. Superior quality heat-treated steel. Machined for strength with black oxide finish. Finish ensures rust and corrosion protection.

Product Features:

Valve Spring Retainers for Use OE Cast Iron Heads
Superior Quality Heat-Treated Steel
Machined for Strength with Black Oxide Finish
Finish Ensures Rust and Corrosion Protection

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$27.49

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

Product Features:

Felcoid/Plus gaskets have a fiber sheet core and a latex rubber coating to eliminate potential leakage paths. The core material resists crushing and splitting, while providing excellent blowout resistance.
With steel core to provide ultimate excellent blowout resistance.
Not intended for use in emission controlled vehicles.

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$31.49

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

Product Features:

Felcoid/Plus gaskets have a fiber sheet core and a latex rubber coating to eliminate potential leakage paths. The core material resists crushing and splitting, while providing excellent blowout resistance.
With steel core to provide ultimate excellent blowout resistance.
Not intended for use in emission controlled vehicles.

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$387.99

For 3000 to 7500 RPM high-performance engines. For oval port heads. Superior performance for drag racing and marine. Accepts 4500 series carburetors. Can use standard flange carburetor with Edelbrock adapter PN(8716). Flow max power use 1 inch spacer PN(8717). Match with Victor and Victor Jr. heads. Includes nitrous bosses on runners.

Product Features:

For 3000 to 7500 RPM High-Performance Engines
For Oval Port Heads
Superior Performance for Drag Racing and Marine
Accepts 4500 Series Carburetors
Can Use Std-Flange Carb w/Edelbrock Adptr PN[8716]
For Max Power Use 1-in. Spacer PN[8717]
Match with Victor and Victor Jr Race Heads
Includes Nitrous Bosses on Runners

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$394.99

Product Features:

High Rise/Dual Plane Design For Maximum Torque
Fully CNC Machined For A Perfect Fit
Square Bore Carburetor Flange
Exhaust Crossover For Improved Street Drivability
Permanent Mold Casting Process
Lighter/Smoother/Better Looking
More Consistent Castings

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$473.99

Product Features:

Designed for Idle to 5500 RPM
Manifold has a Balanced 180+ Firing Order
Contains Exhaust Gas Heat Riser
Offers Excellent Performance Potential
Front Oil Filler Tube Boss Included
Carburetor Center-to-Center Dimensions = 5-1/2 in
Also Available Polished PN[5419] But Not Fit HEI
Use Rochester 2GC (small 1-7/16 in bore)

Popular 1978 GMC K25 Performance Engines Categories

Performance Engine Coolant Thermostats

Performance Intake Manifolds

Performance Engine Water Pumps

Performance Water Outlets

Performance Engine Cylinder Head Gaskets

Performance Engine Camshaft and Lifter Kits

Performance Engine Intake Manifold Gaskets

Performance Engine Timing Sets and Components

Performance Engine Valve Springs

Performance Engine Valve Cover Gasket Sets

Performance Engine Rocker Arms

Performance Engine Camshafts

Performance Engine Oil Pan Gaskets

Performance Intake Manifold Hardware

Performance Engine Main Bearing Gasket Sets

Performance Engine Cylinder Head Bolts

Performance Engine Cylinder Head Installation Kits

Performance Engine Timing Cover Gasket Sets

Performance Engine Push Rods

Performance Engine Cylinder Heads

Performance Torque Converters

Performance Engine Valve Spring Retainer

Maybe you’re in the middle of a full rebuild of that 1978 GMC K25. Maybe you just need a couple of Performance Engines. Either way, Advance Auto Parts has 134 different Performance Engines in our inventory ranging from $14.99 to $1,322.99. That means you can find the exact parts or products you need to keep that 1978 GMC K25 running smoothly.

Performance Engines are only as good as their brand. We stock 7 different brands to make sure you have plenty of trusted parts to choose from for your 1978 GMC K25. Mr. Gasket, Edelbrock, and FEL-PRO Performance are just some of the brands we stock. Search for brands you know or compare prices and reviews to help you decide!

We know you’ll find the perfect Performance Engines for your 1978 GMC K25, but don’t take our word for it – read our customer ratings and reviews and buy with confidence. Out of the 202 reviews in this category, some of the top rated parts include Action Plus Water Pumps with 3.7 stars and Action Plus Water Pumps with 1.5 stars.

So if you’re in the market for aftermarket Performance Engines to keep your 1978 GMC K25 rolling for years to come, look no further. Shop online and have your products shipped direct to your door, or pick up at the nearest Advance Auto Parts location today!

Performance Engines Brands To Make Your 1978 GMC K25 Last

Simple repair, complete replacement, or a full rebuild. No matter the job, your 1978 GMC K25 demands trusted brand parts and products to keep it running. Many trusted brands of Performance Engines make up Advance Auto Parts’ inventory, and all are ready to help make your K25 the best it can be. Be sure to browse some of our top Performance Engines brands and parts.

Popular B & M Performance Engines

We carry B & M parts in our stock across Performance Torque Converters categories, plus more. For a 1978 GMC K25, our most popular B & M Performance Engines include:

from $339.99

(1)

Tork Master 2400

Performance Torque Converters

from $499.99

(1)

Tork Master 3000

Performance Torque Converters

Top 1978 GMC K25 Performance Engines from Mr. Gasket

Mr. Gasket products are another trusted brand when it comes to Performance Engines for your 1978 GMC K25. Popular Mr. Gasket parts include:

from $26.99

(20)

High Performance 180 Degree Thermostat for Increased Flow

Performance Engine Coolant Thermostats

FAQs for 1978 GMC K25 Performance Engines

What are the most purchased Performance Engines for the 1978 GMC K25?

Out of 134 Performance Engines for the 1978 GMC K25, the most popular in our inventory are:

from $195.99

(7)

Performer EPS Intake Manifold for 1955-86 Small-Block Chevy

Performance Intake Manifolds

from $39.49

(1)

Cylinder Head Gasket: Multi-Layered Steel, Without Head Bolts

Performance Engine Cylinder Head Gaskets

from $27.49

This product is not rated

Lower Intake Manifold Gasket Set: 9 Piece Set

Performance Engine Intake Manifold Gaskets

What are the top-rated 1978 GMC K25 Performance Engines?

Top-rated Performance Engines for your 1978 GMC K25 based on customer reviews/ratings are:

from $215.99

(3)

Action Plus Water Pumps

“I bought this item for my 1979 Camaro SBC for Street/Strip application. Water pump weighs 4 LBS less than factory, comes with its own cork gaskets. N”

from $215.99

(2)

Action Plus Water Pumps

“The twisted neck comes to far up on the hub. For a 2 groove pulley it causes the pulley to hit the water pump. You will also need new bolts for the”

from $334.99

(1)

Performer-Plus Camshaft Kit for 1957-86 Small-Block Chevrolet

“put this cam and lifter kit in my 412 inch small block chevy. works well with patriot alum. heads and edelbrock duel quad intake. all this is running ”

1978 GMC K25 Performance Engines

More 1978 GMC K25 Performance Engines

Essential 1978 GMC K25 Performance Engines

Mr. Gasket – Water Neck (Part No.2557)

Mr. Gasket – Intake Gasket Set – Standard Duty – Big Block Chevy With Stock Rectangle Ports – 1.75"W X 2.50"H (Part No.108)

Competition Cams – Thumpr 227/241 Hydraulic Flat Cam (Part No.11-600-4)

Edelbrock – Front Timing Cover Gasket Set #6998 For Big-Block Chevy, With Front Seal (Part No.6998)

B & M – Torque Converter, Nitrous Holeshot 3600 (Part No.20482)

Mr. Gasket – Intake Bolt Kit (Part No.5003)

Mr. Gasket – Ultra Seal: Competition Screw-In Rocker Arm Studs (Part No.1075)

Edelbrock – Performer Small-Block Chevy Cylinder Head 64cc Hydraulic Flat Tappet (Part No.60909)

Competition Cams – Thumpr 243/257 Hydraulic Flat Cam and Lifter Kit for Chevrolet Big Block 396-454 (Part No.CL11-602-4)

Weiand – Action Plus Water Pumps (Part No.9208P)

Mr. Gasket – Rear Main Seal Gasket (Part No.1960)

Edelbrock – Performer-Link Adjustable True-Roller Timing Chain Set (Part No.7810)

Edelbrock – Engine Gasket Set (Head / Intake / Exhaust / Valve Cover) for Chevrolet (Part No.7361)

Mr. Gasket – Ultra Seal: Cylinder Head Bolts (Part No.941G)

Edelbrock – Pushrod Set for S/B Chevy (Part No.9630)

Mr. Gasket – Cylinder Head Dowel Pins (Part No.4377)

Edelbrock – Sure Seat Valve Springs for Big-Block Chevy 396-402-427-454 V8 (Part No.5862)

Edelbrock – Complete Sure Seat Valve Spring Kit for Chevy 396-402-427-454 V8 (Part No.5895)

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

FEL-PRO Performance – Engine Valve Cover Gasket Set (Part No.1605)

FEL-PRO Performance – Engine Valve Cover Gasket Set (Part No.1640)

Edelbrock – Performer Series Retainer (Qty 16) (Part No.9730)

Edelbrock – Performer Series Retainer (Qty 16) (Part No.9721)

FEL-PRO Performance – PERFORMANCE OIL PAN GASKET SET (Part No.1804)

FEL-PRO Performance – PERFORMANCE OIL PAN GASKET SET (Part No.1819)

Edelbrock – Victor 454-R Intake Manifold Big-Block Chevy (Part No.2909)

Weiand – Stealth; Intake Manifold (Part No.8018)

Edelbrock – C-357-B Triple-Deuce Manifold for S/B Chevy 4-Bolt Carb Pattern (Part No.5419)

Popular 1978 GMC K25 Performance Engines Categories