M-3075-A This kit enables owners of 1979-93 Mustang/Capri vehicles to upgrade them to 1996 levels with low-friction ball joints and improved inner bushings. Dramatically improves impact harshness qualities of vehicle and is recommended when heavy-duty suspension components are added. NOTE: The ball joint in the kit has been upgraded. They have an improved nylon bearing to further reduce impact harshness. (Since no measurable wear could be detected after 250,000 miles of fleet testing, the wear detectors were eliminated). Kit includes LH and RH lower control arm assemblies.