1978 GMC K25 Performance and Racing Products

Essential 1978 GMC K25 Performance and Racing Products

Energy Suspension – Body Cab Mount Set (Part No.3.4103G)

Body Cab Mount Set

from

$116.99
Will replace distorted and worn-out original rubber mounts to maintain car body and truck cab to bed alignment. Original rubber mounts are so soft they often crack, distort, and crush so badly they often fall off and aluminum body mounts are too harsh for street use that they tend to break and cause other components to break. Energy’s specially formulated Hyper-Flex polyurethane cab and body mounts combine the best qualities of both: they’re soft enough for a smooth ride, yet rugged enough for the most demanding road or track. Most sets have a strong zinc plated steel ring molded into them – for added durability and when the application requires it.

Product Features:
  • Assures Longer Lasting Cab to Bed Alignment
  • Replace to Restore Ride Height
  • Gain Durability
  • Stronger Than Original Rubber Mounts
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Energy Suspension – Hyper-Flex System (Part No.3.18105G)

Hyper-Flex System

from

$366.99
Product Features:
  • Incredible Improvement in Control
  • Maintains Proper Caster and Camber Alignment
  • Increase in Handling and Control
  • Greatly Reduce Wheel Hop on Quick Acceleration
  • Even Braking Control is Improved
  • Better Suspension Stability
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B & M – Shift Improver Kit For 68-81 TH-350 Transmission (Part No.30262)

Shift Improver Kit For 68-81 TH-350 Transmission

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$59.99
HEAVY DUTY-Firm positive shifts without loss of driver comfort for improved performance in all street vehicles. STREET/STRIP-Positive shifts for high performance street use or for competitive events. Hardest, quickest possible shift.

Product Features:
  • Provides Crisp Shifts
  • On Any Stock Automatic Transmission
  • Eliminates Soft/Sluggish Shift
  • Eliminates Shift Overlap
  • Eliminate Clutch and Band Wear
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MSD Ignition – Distributor; Street Fire; Chevrolet V8 GM HEI with 4-Pin Module (Part No.8362)

Distributor; Street Fire; Chevrolet V8 GM HEI with 4-Pin Module

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$259.99
Introducing the Street Fire value-line brand of MSD Ignition. Street Fire components offer a quality designed alternative to the bottom bargain parts that are springing up all over. We’re so assured with the quality of our new Street Fire HEI distributor that we provide a one year warranty with it! We know the importance of a centrifugal advance in a distributor so our engineers made sure that the Street Fire receive an advance assembly with coated weights and welded weight pins (Not just pressed in like other models). Another area that you cannot afford to scrimp on is with a distributor gear. The Street Fire is fit with the same gear that is used on our Pro-Billet models. The metallurgy of this gear has been refined for years to perform through the harshest conditions. Inside, the ignition module and coil work together to produce a stout spark to light the fuel mixture for great performance.

Product Features:
  • Included 4-Pin Module
  • The only value priced HEI with a full one year warranty
  • Heavy duty distributor gear for durability
  • Welded weight pins and heavy duty construction
  • Adjustable vacuum advance helps tune it to each engine
  • 21° of mechanical advance
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Rancho – Dual Steering Damper Kit (Part No.RS98501)

Dual Steering Damper Kit

from

$251.99
Designed to reduce wheel shimmy and end vibration caused by larger tires, the Rancho® steering stabilizer kit cuts down on steering arm fatigue to improve handling. The kit includes two Rancho RS5000® steering stabilizers and installation brackets.

Product Features:
  • COMPATIBILITY — Designed for a variety of trucks and SUVs from Chevrolet®, GMC®, Ford®, Dodge®, Jeep® and Plymouth®
  • IMPROVED HANDLING AND PERFORMANCE — Reduces wheel shimmy, bump steer and vibration which helps minimize on- or off-road driver fatigue
  • ACCOMMODATES LARGER TIRES — Engineered for vehicles with oversized wheels and tires.
  • ENGINEERED TO LAST — Features protective boot to shield shock rod and oil seal and 0.25-in. high-strength, low-alloy steel bracket construction for long life
  • EASY TO INSTALL — Includes one Rancho RS5000® steering stabilizer and brackets that bolt directly to factory steering linkage with included mounting hardware, no modifications needed
  • RESISTS CORROSION — Durable black powder-coated and/or zinc-plated brackets resist rust and corrosion
  • PRECISION DESIGN — Brackets are CNC cut and bent to exact specifications for a perfect fit
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B & M – Automatic Shifter, Megashifter-Right Hand Drive (Part No.80685)

Automatic Shifter, Megashifter-Right Hand Drive

from

$456.99
The B&M Megashifter has it all, form, function and classic style. This all adds up to bring you a quality shifter that’s been one of the most popular automatic shifters of all time. The light truck Megashifter is better suited for truck and bench seat app

Product Features:
  • Universal Floor Mount Application
  • Cable Operated
  • Quick Installation
  • Accurate Shifting
  • NHRA/IHRA Reverse Lockout Meets Requirements
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Energy Suspension – Transmission Mount (Part No.3.1108G)

Transmission Mount

from

$41.99
A true performance application component for cars, trucks, hot rods, racing/competition, yet popularly used for street vehicles when more horsepower is added. Soft running enough to absorb vibrations for street use yet rugged for racing use. Helps control torque on high performance vehicles. Maintains proper drive shaft angle to help prevent early wear and unexpected power train damage. Replaces the original, short lived and typically too-soft rubber mounts and outdates those hard-running metal transmission mounts. Resistant to under vehicle fluid oils, coolants and road contaminants. Made of Energy’s Hyper-Flex performance polyurethane and heavy duty hardware – for added durability.

Product Features:
  • Unique Safety Interlock Design
  • Impervious to Vehicle Oils and Chemicals
  • Strong Enough Too Handle High Performance
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Energy Suspension – Shackle Eye Set (Part No.3.2126R)

Shackle Eye Set

from

$24.99
Product Features:
  • Made from HYPER-Flex Polyurethane
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MSD Ignition – Rotor; GM HEI Late Model; External Coil Cap (Part No.8427)

Rotor; GM HEI Late Model; External Coil Cap

from

$16.99
Rotor assembly for a GM HEI late model with external coil cap Chevy V8 cap-a-dapt. The cap and rotor of any ignition system must be considered maintenance items. Just as you change the oil and filter of your car, you should always replace the cap and rotor as a set. To make things easy, we now offer these cap and rotor replacement kits.

Product Features:
  • Resist Carbon Tracking
  • Max Voltage Transfer
  • Molded From Insulated Material
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Mr. Gasket – Water Outlet Gasket (Part No.738G)

Water Outlet Gasket

from

$30.99
Manufactured from a blend of nitrile rubber and fiber for excellent sealing and durability. Precision die cut for application.

Product Features:
  • Edge molded rubber water outlet gasket is reusable
  • Requires no gasket sealer
  • Solid aluminum carrier for strength/rigidity
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Edelbrock – Pushrod Set for S/B Chevy (Part No.9629)

Pushrod Set for S/B Chevy

from

$187.99


Product Features:
  • Case-Hardened Tubing
  • Surface Hardening
  • Welded Ends
  • 0.3125 in. Diameter
  • Use with or without Hardened Steel Guideplates
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Mr. Gasket – Aluminum Valve Cover (Part No.6854)

Aluminum Valve Cover

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$159.99
Mr. Gasket’s aluminum valve covers are precision die cast for light weight and a perfect fit. Beautifully polished to a high luster, they are sure to enhance the appearance of any engine compartment. They feature an extended sealing lip to positively locate and secure the gasket and stop it from moving to eliminate oil leaks. Available with plain or ball- milled tops and include a 1 1/4 inch diameter breather hole, except where noted. Packaged two per set.

Product Features:
  • 0.125 in. Thick
  • Lightweight
  • Precision Die Cast
  • Extended Sealing Lip
  • Stops Gasket From Moving
  • A Perfect Fit
  • Beautifully Polished To A High Luster
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Edelbrock – Performer; Cylinder Head (Part No.60469)

Performer; Cylinder Head

from

$569.99


Product Features:
  • Out-of-the-Box Bolt-On Performance
  • Designed For Street/High Performance Big Blocks
  • Specially Designed Oval Ports
  • Increased Flow And Velocity
  • Highly Efficient Semi-Open Style Chamber
  • High Velocity Short Intake Ports
  • Fit GM Mark IV; Gen V; and Gen VI Blocks
  • Bare Head Only; Use PN[60479] for Complete
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Edelbrock – Performer-Plus Camshaft Kit for 1957-86 Small-Block Chevrolet (Part No.2103)

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

from

$334.99


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

Ultra Seal; Competition Screw-In Rocker Arm Studs

from

$73.99
This stud uses heat treated grade 8 alloy steel. The enlarged radius base provides extra strength for a more durable stable shank. Black plated finish. Fits Chevy small block and Ford small block.

Product Features:
  • Heat-treated
  • Grade 8 alloy steel
  • Ex strength enlarged radius
  • More durable/stable shank
  • Prevents stud flexing
  • Black plated finish
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Hooker Headers – Super Comp. Header (Part No.2827-1HKR)

Super Comp. Header

from

$898.99
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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Mallory – Distributor Wiring Harness (Part No.29349)

Distributor Wiring Harness

from

$25.99


Product Features:
  • Service Part
  • Makes Connections Quick And Easy
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Mr. Gasket – Water Neck (Part No.9141G)

Water Neck

from

$56.99
This chrome plated water neck is precision die cast for a great fit. It features an O-ring style seal to prevent water leaks. These water necks are first polished to a high luster then chrome plated for lasting beauty.

Product Features:
  • Chrome plated aluminum
  • O-ring style to prevent leaks
  • Swivels for hard to fit applications
  • Comes with allen head bolts
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Mr. Gasket – Ultra Seal; Exhaust Gasket Set (Part No.5910)

Ultra Seal; Exhaust Gasket Set

from

$35.99
Graphite impregnated facing and a steel expanded metal core. Superior tensile strength. Resists cracking and withstands intense heat. Resists deteriorating. Anti-stick properties and easy removal for disassembly.

Product Features:
  • Withstands intense exhaust heat
  • Graphite-impregnated facing
  • Steel expanded metal core
  • Superior tensile strength
  • Resists deteriorating
  • Anti-stick properties
  • Easy removal for disassembly
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Spectre – SBC Aluminum Timing Cover (Part No.4935)

SBC Aluminum Timing Cover

from

$99.99
The Spectre Timing Cover Kit is designed to protect components such as timing gears and chain or belt. This timing cover features a polished aluminum finish, and is engineered for optimum fit and function.

Product Features:
  • Fits Small Block Chevrolet 283-400
  • Polished aluminum construction
  • Made from lightweight aluminum
  • Includes cover, bolts, gaskets and seal
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Mr. Gasket – Ultra Seal; Cylinder Head Bolts (Part No.941G)

Ultra Seal; Cylinder Head Bolts

from

$64.99
These grade 8 alloy, longer length bolts allow increased torque and clamping.

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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Spectre – Sbc Fuel Mint Plate W/Bolts (Part No.42493)

Sbc Fuel Mint Plate W/Bolts

from

$12.99
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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Flowtech – Super Street; Manifold Dual Kit (Part No.52525FLT)

Super Street; Manifold Dual Kit

from

$282.99


Product Features:
  • Increase Performance
  • Heavy Duty
  • Manifold Dual Kit
  • Includes All Hardware
  • Installation Instructions
  • Offer Maximum Versatility
  • Mufflers Not Included
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Spectre – Alternator Bracket (Part No.4719)

Alternator Bracket

from

$30.99
This Spectre Alternator Bracket is an upper mount designed to fit 1969 and later Chevrolet Big Block engines with a long water pump. Featuring a triple chrome-plated finish and high quality steel construction, this part is an OEM replacement that mounts on the passenger’s side.

Product Features:
  • Fits Big Block Chevy engines with a long water pump from 1969 and later
  • Manufactured from high quality steel
  • Upper bracket for passenger side mounting
  • Features a triple chrome-plated finish
  • Stock replacement part
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Mr. Gasket – Breather/Oil Filler Cap (Part No.2060)

Breather/Oil Filler Cap

from

$17.99
This chrome plated breather, embossed with a Mr. Gasket logo, is perfect for race car vacuum balance systems and OEM use. It fits any 1 1/4 inch diameter hole. It has metal baffle/foam element with 1 inch outer diameter neck and 5/8 inch outer diameter breather tube.

Product Features:
  • Internally battled
  • High-porosity filter
  • Ideal for high performance
  • Includes rubber grommet
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Spectre – Pulley (Part No.4409)

Pulley

from

$57.99
Spectre’s high quality crankshaft, alternator and engine pulley sets are designed to help dress up your engine compartment. All of our pulleys are designed to work in OE applications and with the OE style serpentine or v-belt configuration.

Product Features:
  • Machined aluminum finish
  • Single belt groove
  • 6-9/16 In. diameter-note: identify the water pump by looking at the distance between it and the timing cover, long water pumps are about 1 In. away from the timing cover
  • Easy to install
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Hays – Street/Strip; Clutch Kit (Part No.85-114)

Street/Strip; Clutch Kit

from

$553.99
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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Mr. Gasket – Throttle Cable Bracket (Part No.9885)

Throttle Cable Bracket

from

$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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Popular 1978 GMC K25 Performance and Racing Products Categories

1978 GMC K25 Performance and Racing Products

You count on your 1978 GMC K25 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 281 Performance and Racing Products ranging in price from $4.99 to $3,779.99, you’re sure to find everything you need for your 1978 GMC K25.

Brands matter. If you want to shop a specific Performance and Racing Products brand, we stock 20 different brands like Mr. Gasket, K&N, and Accel. 1978 GMC K25 Performance and Racing Products start as low as $4.99!

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 1,105 extensive product reviews on 1978 GMC K25 Performance and Racing Products. Some of the top-rated Performance and Racing Products products we carry are Differential Ring And Pinion with 4.2 stars and Distributor; Street Fire; Chevrolet V8 GM HEI with 4-Pin Module with 4.7 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 K25 below to get started!

Top-Rated Performance and Racing Products Brands For Your 1978 GMC K25

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 K25 running right for years to come. In our inventory you’ll find brands like Mr. Gasket, K&N, Accel, and even more.

Popular Rancho Performance and Racing Products

You’ll find popular Rancho brand products across Performance Steering Products. All are waiting to get your 1978 GMC K25 back on the road. Some of the top-rated Rancho products in these categories are:
RS5000 Steering Damper
from $89.99
(4)
RS5000 Steering Damper
Performance Steering Stabilizers

Top-Rated Accel Performance and Racing Products


If Accel are what you’re looking for, our inventory holds plenty. We stock Accel brand Performance and Racing Products for your 1978 GMC K25, and some of our most reviewed Accel parts include:
Distributor Cap And Rotor Kit
from $41.99
(23)
Distributor Cap And Rotor Kit
Performance Distributor Cap and Rotor Kits
Distributor Cap And Rotor Kit
from $40.99
(3)
Distributor Cap And Rotor Kit
Performance Distributor Cap and Rotor Kits

FAQs for 1978 GMC K25 Performance and Racing Products

What are the most purchased Performance and Racing Products for the 1978 GMC K25?

Out of 281 Performance and Racing Products for the 1978 GMC K25, the most popular in our inventory are:
Transmission Mount
from $41.99
(17)
Transmission Mount
Performance Engine and Transmission Mounts

What are the top-rated 1978 GMC K25 Performance and Racing Products?

Top-rated Performance and Racing Products for your 1978 GMC K25 based on customer reviews/ratings are:
Differential Ring And Pinion
from $342.99
(23)
Differential Ring And Pinion
“Good product good price”
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
“Bought this distributor for my 350. Runs like a champ now, and is very responsive.”
Exhaust Gasket Set
from $19.99
(14)
Exhaust Gasket Set
“Put new headers on motor”