Rancho Performance upper control arms enhance the performance and durability of your level or lifted Chevrolet Silverado/GMC Sierra 1500 truck. Made of heavy-duty tubing, these control arms keep the ball joint in the proper angle. Product Features:COMPATIBILITY -- Designed for leveled and lifted Chevrolet Silverado 1500 and GMC Sierra 1500 trucksENHANCES PERFORMANCE -- Keeps the ball joint at the proper angle for leveled and lifted applications while providing additional wheel travel and caster for lifted vehicles (with shock upgrade)RESISTS CORROSION -- Durable black powder-coat finish resists rust and corrosionENGINEERED TO LAST -- Made of heavy-duty, tubular steel for durability and features OE-style rubber bushings and preinstalled, replaceable ball jointsEASY TO INSTALL -- Direct fit, bolt-on design includes all hardware for easy installation