QA1's replacement ball joint housings for your rebuildable QA1 Ultimate Ball Joints feature the following: Ultimate low friction operation. Most wear resistant design available. On-the-car adjustability. Self lubricating. Owner rebuildable. Bolt-In type housing. For Upper Ball Joint only. For QA1 Ultimate Ball Joints ONLY: (72110103) K6136 Style. For Racing use on 1973-95 Compatible with Chevy/GMC Pickups and 1971-76 Impala.