DMR WARBIRD W/ WAR MACHINE air cleaner cover. Machined from billet aluminum, black anodized, and laser etched. Comes with mounting bolt. Inside I.D. is 5.5" which is standard size for most high flow air filter systems such as S&S stealth kit, Screamin eagle, Ness big sucker stage 1, and many more. If your air cleaner measures 5-1/2" on the outside diameter where the cover goes, this will fit. MADE IN THE USA!