Upgrade GM rear control arms for better traction and handling.Rear control arms are one of the most important suspension modifications that can be done to your GM vehicle. Stock control arms are on the borderline of "junk", with weak materials that can lead to traction loss and poor handling. The included polyurethane bushings are an excellent improvement over the OEM rubber bushings, helping to reduce traction loss and improve ride quality. These control arms are a direct bolt on replacement designed to