64-73 Mustang Front Sprg Isolators-Uppers

The 64-73 Mustang Front Sprg Isolators-Uppers by PROTHANE are precision-engineered polyurethane coil spring isolators designed for first-generation Ford Mustangs (1964–1973). These front upper spring isolators replace worn OEM components that have degraded over decades, restoring suspension geometry and ride quality. Whether you're conducting a frame-off restoration, rebuilding aging suspension for a vintage muscle car, or maintaining a classic vehicle for show or street duty, these isolators provide the structural integrity needed to support coil spring loads properly.

Manufactured from durable polyurethane in a distinctive red finish, the 64-73 Mustang Front Sprg Isolators-Uppers offer superior resistance to oil, ozone, and UV degradation compared to original rubber compounds. The polyurethane formulation maintains elasticity and load-bearing capacity across temperature extremes, preventing the cracking, crumbling, and permanent set that characterizes aged OEM isolators. Each pair (two isolators) measures 6.2 x 4.1 x 6.2 inches and weighs 0.52 lbs total, providing a lightweight yet robust interface between the coil spring assembly and the vehicle frame's upper mounting points.

These isolators are essential for anyone restoring or maintaining 1964–1973 Mustang models, from casual enthusiasts to professional restoration shops. Installation requires removal of the front coil spring assembly and upper control arm components; proper suspension support and safety procedures are mandatory during fitment. The pair format ensures balanced suspension geometry front-to-rear, critical for handling stability and ride comfort. PROTHANE's polyurethane construction has been the industry standard in classic car suspension restoration for decades, trusted by restorers and collectors who demand longevity without compromising authenticity or drivability.