TQ metal bearing design enables grease to flow through the bearing to the stud for reduced friction and enhanced strength and stability, Premium cover plate design allows for tighter tolerances vs traditional cover plate designs, providing a more durable and extended life for the control arm, TQ steel composition results in a stronger component, Our full-ball metal stud provides smooth, consistent, rotational movement resulting in more responsive steering, Forged, CNC-machined shell leads to high-quality, precision-made performance and additional strength, Part Reference Numbers : CK620177 SK620177 CB81087PR CB81087 CB81237 MS25117 GS25117 CMS25117 K620177 RK620177 171152 2605521 TK620177, Part Reference Numbers : CK620178 SK620178 CB81088PR CB81088 CB81238 MS25118 GS25118 CMS25118 K620178 RK620178 181125 2605522 TK620178, Kit Includes: 2x Front Upper Suspension Control Arm and Ball Joint Assembly (Both Side), Part Reference Numbers : CK620177 SK620177 CB81087PR CB81087 CB81237 MS25117 GS25117 CMS25117 K620177 RK620177 171152 2605521 TK620177 CK620178 SK620178 CB81088PR CB81088 CB81238 MS25118 GS25118 CMS25118 K620178 RK620178 181125 2605522 TK620178