ACDelco Silver (Advantage) Rack and Pinion Bellow Kits are a quality, high value alternative for General Motors vehicles as well as most makes and models and are backed by General Motors. These bellow kits are installed on each side of your vehicle's rack and pinion steering system, helping protect the rack from exposure to water, debris, and other potentially damaging contaminants. ACDelco Silver (Advantage) parts are a good choice for many vehicles on the road today. Some ACDelco Silver parts may have formerly appeared as ACDelco Advantage.