Prothane 7-312 GM Rear Control Arm Polyurethane Bushing Kit Full Size 1978-1995

The Prothane 7-312 is a rear control arm polyurethane bushing kit designed as a direct performance upgrade over worn factory rubber bushings on full-size GM B-body vehicles from 1978 to 1995. Soft, deteriorated OEM rubber bushings allow the control arms to shift under load, throwing off alignment settings and degrading handling precision — this kit eliminates that problem at its source.

Prothane's polyurethane compound is significantly firmer than OEM rubber, resisting deflection under cornering, braking, and acceleration forces. This translates to more consistent wheel alignment, reduced body wander, and sharper steering response. Unlike rubber, polyurethane also resists breakdown from road salts, grime, oils, and environmental exposure, making these bushings a long-lasting solution.

Key Features:

• Polyurethane construction — firmer and more durable than OEM rubber
• Maintains alignment settings under load for consistent handling
• Resists deterioration from road chemicals, salt, and fluids
• Available in red or black to suit your preference
• Includes Prothane Super Grease for proper installation lubrication
• Backed by Prothane's lifetime warranty against defects in materials and workmanship

Installation note: Apply the included Super Grease thoroughly to each bushing during installation to ensure smooth operation and prevent squeaking. This kit is designed as a direct replacement and does not require shell modification on compatible applications.