57-72 Ford F-100 / F-150 Rear 2WD Black Spring and Shackle Set Energy Suspension 4.2113G

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.