Prothane 7-1122 Polyurethane Sway Bar Bushing 5/8" GM Rear Subframe 1-Bolt

The Prothane 7-1122 is a polyurethane stabilizer bar bushing designed to replace the factory rubber bushings on GM rear subframe applications from 1967–1981. Engineered to fit 5/8" diameter sway bars with a 1-bolt mounting configuration, this bushing delivers a direct, performance-oriented upgrade over the soft, compliant OEM rubber counterpart.

Prothane polyurethane bushings outperform stock rubber by significantly reducing bushing deflection under cornering loads, improving the effectiveness of the OEM stabilizer (anti-roll/sway) bar without requiring a larger bar. The result is tighter body roll control, more predictable handling, and a firmer, more connected feel on the road or track.

Key Features:

• Polyurethane construction — firmer than OEM rubber for improved anti-roll performance
• Grooved bore design — engineered to retain Prothane's super grease for smooth, quiet operation
• 5/8" bore diameter — fits stock and performance sway bars of matching diameter
• 1-bolt mounting — direct OEM replacement fitment
• Also compatible with larger-diameter high-performance sway bars of the same bore size
• Made in the USA by Prothane, a trusted name in performance polyurethane suspension components

Installation is straightforward and typically requires no modifications. Prothane's super grease should be applied to the grooved bore at installation to ensure long-lasting, rattle-free performance. This bushing is a cost-effective way to restore or improve the handling dynamics of classic GM vehicles.