E-Z-GO 21780G1 Rear Shock Absorber for Golf Cart Used on E-Z-GO Gas & Electric 1979-1994 Marathon & PC4 (Personnel Carrier) Models Part of your vehicle's rear suspension that, along with the spring, controls the up-and-down motion of your wheels Bushings are not included with this shock, please reference the section for Bushings to order bushings for your specific vehicle Shocks should be replaced if you experience leakage or "bottoming-out"