Prothane 7-309-BL GM Full Size Rear Upper & Lower Control Arm Bushing Kit - Black

The Prothane 7-309-BL is a rear upper and lower control arm bushing kit designed for 1965–1970 GM full-size vehicles. Manufactured from high-performance polyurethane, these bushings are a direct upgrade over soft factory rubber components that wear out, deflect, and allow control arms to shift under load — degrading handling precision and causing alignment drift over time.

Prothane's polyurethane formulation resists compression, wear, and deterioration far better than OEM rubber, delivering tighter suspension geometry and consistent alignment settings mile after mile. The result is improved steering response, reduced body roll, and a more controlled, predictable ride.

Key Features:

• High-performance polyurethane construction — superior durability versus factory rubber
• Covers both upper and lower rear control arm positions
• Black finish for a clean, stealth appearance under the vehicle
• Resists oils, solvents, and road chemicals that degrade rubber bushings
• Helps maintain proper suspension geometry and alignment settings
• Made in the USA by Prothane, a division of DEE Engineering
• Backed by Prothane's lifetime warranty

Whether you're restoring a classic GM full-size or building a performance street machine, the Prothane 7-309-BL bushing kit provides the compliance resistance and long-term durability needed to keep your rear suspension performing at its best.