Alston designed these upper control arms to solve problems often associated with the instalation of a large engine into a small chassis. When header and compoent clearance is a major concern, this control arm kit is the answer. The ball joints have been eliminated in favor of lighter, stronger, sealed aircraft quality bearings. An articulating radius arm and adjustable rod ends provide full control of castor and camber. These Alston upper control arms have been powder coated black for a long lasting, great looking finish.