QA1 RCK52335 Rear Pro-Coil Double Adjustable Coilover Conversion Kit 130 lb/in Springs

The QA1 RCK52335 is a bolt-in rear coilover conversion kit designed for 1964–1972 GM A-body vehicles, delivering a significant upgrade over the factory rear suspension. This double-adjustable system gives performance enthusiasts precise control over ride height and damping, making it equally capable on the street and the track.

At the heart of this kit are lightweight billet aluminum coilover shocks featuring a fully threaded body, allowing ride height to be set from 1/2" higher than stock down to 2.25" lower than stock. The double-adjustable design provides 18 positions of independent compression adjustment and 18 positions of independent rebound adjustment, delivering 324 total valving combinations to dial in your exact setup.

Key Features:

• Double-adjustable shocks with 18 compression and 18 rebound positions (324 combinations)
• Fully threaded aluminum shock body for ride height adjustability
• Includes two coilover shocks, 130 lb/in springs, USA-made mounting brackets, and all necessary hardware
• 100% dyno tested, serialized, and rebuildable by QA1 authorized service centers
• Bolt-in installation — no cutting or welding required
• Designed for stock 1964–1972 A-body 10-bolt and 12-bolt axle housings
• Suitable for street performance, drag racing, autocross, road racing, and street rod applications
• Proudly made in the USA
• Backed by QA1's Limited Lifetime Warranty (registration required at QA1.net)

What's Included: Two double-adjustable aluminum coilover shocks, two 130 lb/in high-travel coilover springs, specially designed mounting brackets, and all required hardware — everything needed for a complete rear coilover conversion.

Fitment Note: This kit is designed to work with stock 1964–1972 A-body 10/12-bolt axle housings. The lower shock mount bracket may not be compatible with aftermarket rear end housings.