The Prothane rear leaf spring bushing for 2004–2006 Ford F150 replaces the factory rear leaf spring bushings with a polyurethane option specified for that application. It is intended to restore the spring-to-chassis interface and maintain proper spring location and movement on the rear axle; choose the correct left/right position and follow vehicle service guidance during installation.
Prothane 04-06 Ford F150 Rear Leaf Spring Bushings - Black