The rear coilover system for 1 GM B-BODY (Impala, Del Ray, Bel Air, Biscayne, Brookwood, Nomad)  is designed to maximize ride quality and handling performance of your classic ride. The system is a direct bolt-on kit that includes everything you need to transform  these impalas into lean mean street driving machines! The Rear HQ coilover kit Includes: Single upper control arms with our patended R-Joint, adjustable panhard Bar, Lower Control Arms, HQ Series Shocks, Springs, Brackets and Hardware. sold as a kit.FEATURESMounts coil over in the factory coil spring location, an area designed to carry the load of the vehicle.Eliminates factory location shocksUses 3.6” stroke eye/eye shock & 8” 575 springsFeatures R-Joints at all pointsRequires only drilling 2 holes in upper spring perch to retain upper coilover mountsIncludes “D” shaped lower control arm bolts that replace stock lower shock mounts – no need to modify the stock axle bracketsFeatures mounting points for stock parking brake cables59-64 kit will include adjustable panhard bar so rear axle lateral location can be corrected at the new ride height