Prothane 7-308-BL Rear Upper Control Arm Bushing Kit Black Polyurethane

The Prothane 7-308-BL is a black polyurethane rear upper control arm bushing kit designed as a direct replacement for worn factory rubber bushings on classic GM full-size vehicles. This kit covers two upper rear control arms and is engineered to restore precise suspension geometry while dramatically improving handling response over aging OEM rubber components.

Worn rubber control arm bushings allow unwanted flex and deflection under load, causing alignment settings to shift and introducing unpredictable handling characteristics. Prothane's premium-grade polyurethane formulation provides superior compliance resistance, ensuring your caster and camber settings stay locked in place during cornering, braking, and acceleration.

Key Features:

• Premium-grade polyurethane construction — significantly more durable than OEM rubber bushings
• Precision-fabricated for a perfect fit — no modifications required for proper installation
• Formulated to retain Prothane's super grease for quiet, squeak-free operation
• Provides necessary rigidity to maintain accurate wheel alignment settings
• Resists oil, ozone, and weathering that degrade standard rubber bushings
• Available in black polyurethane (part 7-308-BL)
• Kit covers two upper rear control arms

Prothane polyurethane suspension components are a proven upgrade over soft factory rubber, delivering improved handling precision and longer service life for street-driven classics and performance builds alike.