QA1 RCK52365 Rear Pro Coil Double Adjustable Coilover Kit 300 lb Springs Big Wheel 71-76 GM B-Body

The QA1 RCK52365 is a bolt-in rear coilover conversion kit engineered specifically for 1971–1976 GM B-Body vehicles running large-diameter (Big Wheel) wheels and tires. Designed for builders who want a true performance suspension upgrade without cutting or welding, this kit replaces the factory leaf or coil springs with a fully adjustable coilover setup featuring stout 300 lb/in springs and QA1's double adjustable aluminum shocks.

Key Features:

• Double Adjustable Shocks — 18 independent positions of compression adjustment and 18 positions of rebound adjustment, yielding 324 possible valving combinations for precise tuning
• 300 lb/in Spring Rate — Stiffer spring rate suited for heavier B-Body builds, aggressive street, and performance driving applications
• Big Wheel Clearance — Specially configured for use with larger aftermarket wheel and tire packages common on B-Body restomod builds
• Fully Threaded Aluminum Body — Allows ride height adjustment from approximately 1" higher than stock down to 3" lower than stock via threaded collar
• Bolt-In Installation — Includes specially designed USA-made mounting brackets, springs, shocks, and all necessary hardware; no cutting or welding required
• 100% Dyno Tested and Serialized — Every shock is individually tested and serialized for quality assurance
• Rebuildable and Revalveable — Serviceable by QA1 or any QA1 authorized service center
• Made in the USA — Manufactured in Lakeville, Minnesota
• Limited Lifetime Warranty — Register at QA1.net/Warranty for coverage for as long as you own the vehicle
• Sold as a complete kit (pair)

The QA1 Pro Coil rear coilover system is a proven solution for classic muscle car and street rod builds, equally capable in drag racing, autocross, road racing, and street performance applications. The independent compression and rebound adjustment on the double adjustable shocks lets you fine-tune the suspension for any driving condition — from a smooth boulevard cruise to a hard track day.

Note: Lower shock mount bracket may not be compatible with all aftermarket rear end housings.