Fits 7.5" and 8.8" solid rear axle Mustangs from 1979 through 2004. These bushings are a direct OEM replacement for the upper control arm bushings located on the differential. New bushings can benefit any solid axle equipped 1979-04 Mustang, and are a must-have when installing Detroit Speed Swivel-Links™. This kit includes two bushings, one for each upper link. The bushings are manufactured from high-durometer rubber to allow for optimal link rotation and pivot motion.