An ACDelco Gold (Professional) Ball Joint is a high quality replacement ideal for many vehicles on the road today. It connects your vehicle’s control arm to its steering knuckle. This ball joint features a polyurethane dust boot, a one-piece housing, and advanced bearings. It also has coated, heat-treated studs and includes all hardware. This premium aftermarket replacement component is manufactured to meet your expectations for fit, form, and function. Some ACDelco Gold parts may have formerly appeared as ACDelco Professional.