The Prothane rear coil spring isolator in red is made for 1979–2004 Ford Mustang rear suspension applications and serves as a replacement spring isolator to reduce noise and cushion the interface between the coil spring and mounting points. Specified for Mustang rear use across the listed years, it’s intended for routine suspension refresh or to address worn isolators.
Prothane 79-04 Ford Mustang Rear Coil Spring Isolator - Red