Spectre Performance HPR9609B Universal Clamp-On Air Filter: Round Tapered; 2.5 in (64 mm) Flange ID; 8 in (203 mm) Height; 5.656 in (144 mm) Base; 3.156 in (80 mm) Top Engineered for increased flow and greater performance Factory pre-oiled and ready to use Quality materials used throughout including washable synthetic filter media, urethane, and steel mesh Clamp-on Style Air Filter Use P/N HPR4820 Accucharge kit to clean and re-oil the filter