Ready to improve the handling of your Chevy or GMC 1960-1966 truck? Upgrade your control arm bushings from old worn-out rubber to high-quality polyurethane. The real control arm bushing set is made to same specifications to replace rubber bushings on GM Four Link Systems. Tracking arm bushings are a must for controlling wheel hop and increased control on cornering. Does not come with shells, you must use your existing outer shells.