QA1 RCK52615 Rear Coilover Conversion Kit with Panhard Bar Double Adjustable 170lb Springs

The QA1 RCK52615 is a bolt-on rear coilover conversion kit designed for 1963–1972 GM C10 trucks. Designed to work with your factory stock trailing arms, this system converts a coil-spring rear suspension to a fully adjustable coilover setup — no cutting, welding, or fabricating required.

This system integrates adjustability into multiple areas so you can fine-tune suspension geometry after lowering. Per-corner ride height adjustment lets you dial in your exact stance, while the included full-length adjustable panhard bar keeps the rear axle centered for more predictable handling. Multiple mounting locations on the panhard bar correct roll center geometry based on your chosen amount of drop.

The coilovers are relocated to the outside of the frame rail, closer to the wheel, providing improved cornering stability. This repositioning also frees up space behind the cab for popular aftermarket rear-mounted fuel tanks.

Kit Specifications:

• Spring rate: 170 lb/in (Soft)
• Spring length: 12 inches
• Shock type: Double Adjustable
• Includes full-length adjustable panhard bar with multiple mounting locations
• Bolt-on installation — compatible with stock truck arms
• Coilovers relocated outside frame rail for improved cornering stability
• Corrects roll center geometry for lowered applications
• Made in the USA

Kit Includes: Frame brackets, axle brackets, linkage assemblies, crossmember assembly, double adjustable coilover shocks, 170 lb/in coilover springs, adjustable panhard bar, and all necessary hardware.

QA1's quality system is ISO 9001 certified. Double adjustable shocks in this kit are eligible for QA1's Limited Lifetime Warranty when registered at QA1.net/Warranty.