Buick GS 400 Parts & Accessories

Buick GS 400 Parts & Accessories

The Buick GS 400 is a muscular A-body performance car from the late 1960s, powered by Buick's 400 cubic inch big-block V8. Parts for the GS 400 include exhaust systems, suspension upgrades, and cold air intake components built for classic muscle car performance and restoration.

Popular Upgrades

Performance headers and dual exhaust systems from Hooker and Flowmaster are the top GS 400 upgrades, releasing the 400 V8's potential with improved exhaust flow and a deep, aggressive exhaust note. Lowering springs and stiffer sway bars tighten the A-body chassis for spirited driving.

What exhaust fits the Buick GS 400?

Performance headers and cat-back exhaust systems from Hooker Headers, Flowmaster, and Edelbrock are direct fits for the Buick GS 400's 400 cubic inch V8, providing power gains and a classic muscle car sound with period-correct aesthetics.

How do I improve handling on the Buick GS 400?

Lowering springs, adjustable shock absorbers, and front and rear sway bar upgrades are the most effective chassis improvements for the Buick GS 400, reducing body roll and improving cornering response for both street driving and shows.

Explore related categories: Exhaust Systems, Suspension Upgrades, Cold Air Intakes.