ACDelco Gold (Professional) Suspension Ball Joints are a high quality alternative to Original Equipment (OE) parts. These suspension ball joints connect your vehicle's control arm to its steering knuckle. This ball joint features a polychloroprene (neoprene) boot with most applications, a one-piece housing, and advanced bearings. It also has coated, heat-treated studs where appropriate and includes all hardware. ACDelco Gold (Professional) parts are manufactured to meet your expectations for fit, form, and function, making them a smart choice for General Motors vehicles, as well as most makes and models, including special applications. These high-quality parts are backed by General Motors. Some ACDelco Gold parts may have formerly appeared as ACDelco Professional.