Compatible with 2000-2006 Chevy Avalanche models (without Factory Premium Ride option);Without Factory Premium Ride. Belltech Lowering Coil Springs have been engineered to provide the visual lowering you are looking for with the OEM quality that you have come to expect from Belltech. Unlike many other offerings on the market, Belltech specializes in not only ride comfort & quality, but increasing the handling performance of your Sport Truck or SUV as well. Each coil is manufactured from chromium alloy steel and is wound, shot peened then powder coated to exact specifications to assure the proper ride height, ride quality and long life you have come to expect from Belltech products.;