Energy Suspension Gm 2 & 4 X Rr Sprg Bush - BlackAdds 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. This Part Fits: Year Make Model Submodel 1973 1974 Chevrolet Blazer Base 1981 Chevrolet K10