QA1 RCK52615 Rear Coilover System1963-1972 GM C10 Double Adjustable 12in. 170lb. SpringsQA1 RCK52615 Rear Coilover System1963 1972 GM C10 Double Adjustable 12in. 170lb. Springs Looking to keep your factory truck arms, but still want coil overs for adjustable ride height? QA1's C10 bolt on rear suspension system is designed to convert trucks originally equipped with a coil spring rear suspension to coil overs. This system integrates adjustability into multiple areas so you can truly fine tune the geometry to create the perfect performance
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