These aftermarket suspension components replace the factory coil springs and shocks in the rear of General Motors “G-body” vehicles. A coilover unit combines a coil spring and a shock absorber into a single assembly, offering adjustable ride height and damping characteristics. This contrasts with the original separate spring and shock configuration of these cars, which were produced from 1978 through 1988.
Installing such a system can significantly improve vehicle handling, reduce body roll, and allow for precise tuning of the suspension to match specific driving styles or track conditions. The adjustability offered by these units makes them popular for drag racing, street performance, and autocross applications. Historically, upgrading the suspension on G-body vehicles has been a common practice to enhance their performance potential, given their popularity and relatively simple design.