This mono-ball style lower ball joint is designed to fit the GM K-6141 ball joint sleeve. It features removable bushings to raise or lower the pivot point to adjust the roll center. It replaces the 71-76 full size GM ball joints commonly used on most aftermarket lower control arms. The kit comes complete with outer sleeve, ball, bushing kit, stud and nuts. "WARNING: This product contains a chemical known to the State of California to cause cancer and birth defects or other reproducitve harm."