QA1 RCK52374 Rear Pro-Coil Single-Adjustable Coilover Conversion Kit 1973-1977 GM A-Body

The QA1 RCK52374 is a bolt-in rear coil-over conversion kit designed specifically for 1973–1977 GM A-Body vehicles. This kit replaces the factory rear suspension with a performance coilover setup, delivering dramatically improved handling, ride quality, and adjustability over stock components — all without cutting or welding.

At the heart of this kit are two single-adjustable Proma Star shocks, QA1's USA-made monotube dampers that allow on-the-fly rebound tuning. Whether you're building a street cruiser, autocross car, or a weekend track machine, the single-adjustability lets you dial in the ride character to match your driving style and conditions.

Key Features:

• Bolt-in installation — no cutting or welding required
• Includes (2) single-adjustable Proma Star coilover shocks
• Includes all necessary mounting brackets and hardware
• Springs sold separately — allows you to select spring rate for your specific application
• USA-manufactured shocks and components
• Engineered specifically for 1973–1977 GM A-Body chassis
• Improves handling, cornering, and overall suspension performance
• Replaces heavy, outdated factory leaf or coil spring rear suspension

This kit does not include springs — select your preferred spring rate separately to fully customize the suspension setup for your vehicle's weight, power level, and intended use. Compatible chassis include the Chevrolet Chevelle, Malibu, Monte Carlo, El Camino, Pontiac LeMans, Oldsmobile Cutlass, and Buick Skylark/GS on the 1973–1977 GM A-Body platform.