The control arm made of hardened steel and compound with RC ball joint which allowed Roll Center adjustment, it will correct the suspension geometry of a lowered car, putting the control arms back closer to its original position, resulting in increased steering response and stability while eliminating bump steer. A good control arm can regulate the movement of wheels quickly each time you turn or corner. . ED process and painting for the highest durability. Equipped with premium quality bushings. Superior strength and durability. OE direct replacement. Dramatically improving handling performance  Note: Harden Rubber Equipped 2 PCS/SET  Fits: Luxgen S5 2012-2020 Luxgen U6 2013-