QA1 has now utilized this technology in ball joints designed and engineered exclusively for high perfomance racing applications. This completely revolutionary ball join design will rock the racing world! For the ultimate in low friction operation (0 ft. lbs breakaway torque!) and the most wear resistant design, look nor ruther than QA1. QA1's patented ball joints feature the following: Ultimate Low Friction Operation o Infinite preload adjustment allows breakaway torque to be set as low as 0 ft. lbs. Completely smooth, bind-free operation. Most Wear Resistant design Available o Precision tolerance ball to race conformity results in even load distribution for unsurpassed wear resistance. Precision ground 52100 bearing steel race ensures long lfie and ultra-smooth operation. Steel Reinforced Self-Lubricating Race o Designed to handle severe impact and high load applications without sacrificing performance. On-the-Car Adjustability o Infinite preload adjustment. No need to remove the ball joint from the car for adjustmentSelf-Lubricating o Fully greaseable, enchanced by self-lubricating components to ensure smooth operation. Multiple Stud lengths Available o Various ball studs are available for easy geometry changes. Fine tune your roll center/Owner Rebuildable o Rebuilding is simple. All parts are replaceable at economical prices.Pit Stop USA offers QA1 Low Friction Upper Ball Joint - 4-Bolt Style - GM (Large) 1210-103 at low everyday prices. Be sure to check out all of our products from QA1 Precision Products including QA1 Precision Products Low Friction Upper Ball Joints.