Moog K8412T Ball Joint Problem Solver powdered metal gusher bearing design enables grease to flow through the bearing to the stud for reduced friction and enhanced strength and stability. Moog engineered steel composition results in a stronger component Full ball metal stud provides 36 degrees of smooth, consistent, rotational movement resulting in more responsive steering. Grease fitting on the angled edge of the ball joint housing provides easy access for lubrication service. Premium polychloroprene boot with grease relief valve keeps contaminants out. Greaseable socket design allows new lubricant to flush contaminants from the assembly, reducing corrosion and wear Fits 1981 - 1996 Ford vehicles Designed as stock replacement Improves chassis performance and durability Easy to install