GKTech - POLYURETHANE 240SX/SKYLINE REAR KNUCKLE BUSHINGS (PAIR)The GKTECH Polyurethane rear knuckle bushing replacements are designed to replace the OEM upper arm bushings on the knuckle side. These are required when removing the ball joint from a HICAS equipped knuckle however can also be used to replace the OEM rubber bushings for camber and traction arms also. These are designed to be used on the knuckle side only and can not be used elsewhere. Fits all S R chassis OEM rear knuckles with 30mm O. D, most rear