Prothane 7-314 GM Mid-Size Rear Control Arm Polyurethane Bushing Kit

The Prothane 7-314 is a polyurethane rear control arm bushing kit engineered specifically for 1964 GM mid-size A-Body vehicles. Designed as a direct upgrade over worn or soft factory rubber bushings, this kit replaces the original rear upper and lower control arm bushings with high-performance polyurethane that holds its shape under hard driving conditions, preserving alignment angles and delivering sharper, more predictable handling.

Factory rubber bushings degrade over time from exposure to heat, road chemicals, and repeated suspension loading. As rubber softens and deforms, rear wheel alignment shifts dynamically during cornering, braking, and acceleration—resulting in unpredictable handling, increased tire wear, and reduced driver confidence. Prothane's polyurethane formulation resists this deformation, maintaining consistent compliance resistance and keeping your rear suspension geometry exactly where it was set.

Key Features:

• Polyurethane construction — holds shape far longer than OEM rubber bushings under repeated stress
• Improved alignment stability — maintains rear camber and toe settings during cornering, hard braking, and acceleration
• Reduced wheel hop and axle wrap — firm bushing material controls unwanted rear-end movement under power
• Resistant to degradation — withstands road salts, oils, ozone, smog, and other corrosive elements that destroy rubber
• Complete kit — includes all bushings needed for the rear control arm positions on eligible 1964 GM mid-size platforms
• Available in red or black — black version sold as MPN 7-314-BL
• Made in the USA — backed by Prothane's lifetime warranty

The Prothane 7-314 is the purpose-built solution for restoring and upgrading the rear suspension on 1964 GM mid-size (A-Body) platforms. Whether used in a restoration build or a performance street application, these bushings deliver tighter, more responsive handling with long-lasting durability that OEM rubber simply cannot match.