Spectre Performance HPR9612K Universal Clamp-On Air Filter: Round Tapered; 4 in (102 mm) Flange ID; 10.25 in (260 mm) Height; 7.5 in (191 mm) Base; 4.313 in (110 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