Featuring a CNC machined 6061 billet backing plate the Fuel Moto Pro Billet air cleaner is the highest quality, best performing, and greatest value Stage 1 air cleaner available. Our kits include only the highest quality components. Install is very easy, and our backing plate offers the absolute best fit available. For the air cleaner element the Fuel Moto Pro Billet AC features a cleanable cotton/gauze High Flow air filter element for superior performance and the Fuel Moto air cleaner kit features a lifetime warranty. The included hardware is of OEM quality. Air cleaner is designed to work with the stock air cleaner cover as well as most aftermarket covers. We offer a 100% satisfaction guarantee with this air cleaner. This kit is manufactured 100% in the USA.