Energy Suspension 01-06 C2500 HD Silverado 2WD Black 36mm Front Sway Bar Bushing SetEnergy Suspension performance polyurethane sway bar bushings and end links offer the greatest improvement in performance among all the products Energy offers. They make a vehicle's sway bar system much more effective like adding a larger, higher performance sway bar! Economy, increased efficiency, and easy installation are just some of the reasons these products are so popular. Made of Hyper Flex(TM) polyurethane that lasts much longer than O. E. M.