These upper adjustable arms have the unique SuperPro “double locking” mechanism that eliminates the adjusters coming loose. Fitted with a Polyurethane spherical joint, with all the articulation and none of the side effects of running a metal one in this location. The bushing delivers: No noticeable NVH increase High articulation Long service life Lifetime warranty This control arm set is suitable for a repair enhancement on standard height suspension and up to 75mm raised suspension.