Leaf Spring Bushing Set Red Rear Complete Spring And Shackle Set w/Molded-In Frame Shackle Bushings Performance Polyurethane Adds a dramatic amount of performance and durability to any vehicle. For cars, trucks and SUVs. Helps the vehicle be in control when maneuvering through turns, during standing start accelerations, braking, even over bumps and berms. Made of Energy's Hyper-Flex(TM) performance polyurethane which lasts 5 -10 times longer than conventional rubber components.