Upper ball joint angles are corrected. Upper control arms reduce positive camber gain which provide greater cornering ability. We do not recommend polyurethane in this location. Upper control arm bushings have grease fitting for easy bushing lubrication. Control arms come with bushings installed.
Upper arms use stock upper ball joints.
Control arm kit comes with ball joint hardware. Alignment specs are included. New One of the biggest complaints we hear from Camaro and Firebird owners is the deflection in the front lower control arm bushings. The control arm bushings deflect allowing the lower control arm to pivot in or out depending on the load. This in turn changes the alignment while the load is applied.