QA1 RCK52378 Rear Pro-Coil Single-Adjustable Coilover Conversion Kit, No Springs, 1978-1996 GM B-Body

The QA1 RCK52378 is a rear coil-over conversion kit designed for 1978–1996 GM B-Body full-size cars. This kit converts the factory rear suspension to a coil-over setup using QA1's Pro-Coil shock system, delivering improved handling, ride height adjustability, and a performance-tuned feel over the stock configuration.

Key Features:

• Single-adjustable Pro-Coil shocks allow tuning of compression and rebound damping to match driving style and road conditions
• Fully threaded shock body enables precise ride height adjustment for stance tuning or corner-weight balancing
• Includes two (2) rear shocks and all necessary mounting brackets and hardware for a complete bolt-in installation
• No cutting or welding required — designed as a direct bolt-in replacement for the factory rear shock setup
• 100% dyno tested and serialized at the factory for consistent, verified performance
• Rebuildable and revalveable by QA1 for long-term serviceability
• Made in the U.S.A.

Springs Not Included: This kit is intended for builders who already have springs or who wish to select spring rates separately. QA1 offers a full range of high-travel Pro-Coil springs in multiple rates to complete this system.

The QA1 Pro-Coil rear coilover conversion system is an ideal upgrade for classic GM B-Body muscle cars and full-size platforms, including Caprice, Impala, Bel Air, Bonneville, and similar vehicles, whether used for street performance, strip, or show applications.