Buick GS 400 Performance Engines

Your One-Stop Shop For Trusted Buick GS 400 Performance Engines

If you’re in search of Buick GS 400 Performance Engines aftermarket or OEM parts, consider your search over! Advance Auto Parts carries 13 Performance Engines from top brands with prices ranging from $13.99 to $504.99.

Beyond great prices, we stock trusted brands manufacturing all types of Performance Engines for your Buick GS 400.

And don’t forget to read customer reviews across all Performance Engines categories in our catalog. Buy with confidence by leveraging past customer experiences of our aftermarket and OEM parts.

At Advance Auto Parts, we don’t think top quality Performance Engines have to cost top dollar, and we prove it. Browse our top Buick GS 400 Performance Engines below, order online to ship to your home, or head into your nearest Advance Auto Parts location to get started.

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Essential Buick GS 400 Performance Engines

Edelbrock – Valve Cover Gasket Set for Buick (Part No.7546)

Valve Cover Gasket Set for Buick

from

$37.99
The Edelbrock valve cover gaskets #7546?provide excellent sealing integrity and conformability for easy installation. The multi-layer construction has two highly compressible, high rubber content, fiber-reinforced outside layers which are chemically bonde

Product Features:
  • 0.1875 in. Thickness
  • Core-Reinforced-Composite Material
  • For Buick 400-455
  • Set of 2
  • Made In The USA
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Mr. Gasket – High Performance Thermostat (Part No.4365)

High Performance Thermostat

from

$32.49
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 195 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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FEL-PRO Performance – Performance Cylinder Head Gasket (Part No.1125)

Performance Cylinder Head Gasket

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$109.99
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 Printo seal 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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Edelbrock – Intake Manifold Gasket for 1967-1976 400-455 Buick (Part No.7246)

Intake Manifold Gasket for 1967-1976 400-455 Buick

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$32.99
Edelbrock part #7246 Intake Gaskets for 1967-1976 400-455 Buick 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 Micropore technology

Product Features:
  • 1.15″x2.38″
  • Features Embossed Silicone Bead Around The Intake Ports & Water Openings
  • .032″ Thick
  • Two Piece Configuration
  • End Seals Not Included
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Competition Cams – VALVE SEALS, TEFLON 3/8" 1 ST (Part No.505-16)

VALVE SEALS, TEFLON 3/8" 1 ST

from

$33.99
COMP Cams offers a complete line of valve stem seals, from the umbrella seals to the positive-stop Teflon seal. These seals are a must to keep unwanted oil from entering the combustion chamber through the clearance in the valve guides. The umbrella seal is normally used when a larger-than-stock diameter spring is used, in the case of a double spring, the positive-stop Teflon seal is used. The umbrella seals require no machining, but with the Teflon seal it is necessary to disassemble the heads and machine the top of the guide with a special .530 diameter cutter. Whenever you are planning an engine overhaul or a cam change, don’t forget the valve seals.

Product Features:
  • Work with .530″ guides and 3/8″ valve stem diameter
  • Valve stem oil seals keep unwanted oil from entering the combustion chamber
  • Several different types of valve seals are offered
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Mr. Gasket – Water Neck (Part No.2557)

Water Neck

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$32.49
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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Edelbrock – Sure Seat Valve Springs for Chrysler 383-400-413-440 V8 1969-79 (Part No.5792)

Sure Seat Valve Springs for Chrysler 383-400-413-440 V8 1969-79

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$149.99
Product Features:
  • Non-Rotator Type
  • 1.550 in. Outer Diameter
  • .190 Wire Size
  • Single Coil Spring Type
  • Set of 16
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Performance Engines Brands You Can Trust For Your Buick GS 400

4 trusted brands of Performance Engines line our shelves, ready to help keep your Buick GS 400 running smooth. Below are some of the most popular brands and their top Performance Engines offerings:

Popular Competition Cams Performance Engines

Competition Cams products for the Buick GS 400 span several categories. Some of the highest-rated Competition Cams Performance Engines that will fit your Buick GS 400 are:
VALVE SEALS, TEFLON 3/8" 1 ST
from $33.99
(1)
VALVE SEALS, TEFLON 3/8" 1 ST
Performance Engine Valve Stem Seal Sets

Most Purchased Buick GS 400 Performance Engines from Mr. Gasket

When you buy the most frequently purchased Mr. Gasket brand Performance Engines, you can be confident it will be the right part for your Buick GS 400. Here are the Mr. Gasket Performance Engines Advanced Auto customers buy the most:
High Performance Thermostat
from $32.49
This product is not rated
High Performance Thermostat
Performance Engine Coolant Thermostats
Water Neck
from $32.49
This product is not rated
Water Neck
Performance Water Outlets
Valve Cover Gasket Set for Buick
from $37.99
This product is not rated
Valve Cover Gasket Set for Buick
Performance Engine Valve Cover Gasket Sets

FAQs for Buick GS 400 Performance Engines

What are the most purchased Performance Engines for the Buick GS 400?

Out of 13 Performance Engines for the Buick GS 400, the most popular in our inventory are:
High Performance Thermostat
from $32.49
This product is not rated
High Performance Thermostat
Performance Engine Coolant Thermostats
Water Neck
from $32.49
This product is not rated
Water Neck
Performance Water Outlets
Valve Cover Gasket Set for Buick
from $37.99
This product is not rated
Valve Cover Gasket Set for Buick
Performance Engine Valve Cover Gasket Sets

More Popular Parts for All Makes