This 6” tall 360-degree radial flow air filter features a 3.5" flange and our oil-free Pro DRY S media with three layers of synthetic media for maximum convenience. Its progressive layering provides great filtration efficiency and dust holding capacity, while not requiring the use of oils. Its inverted top makes for more filter surface area, resulting in longer service intervals. This media is best suited for street use. The smooth one-piece sealed housing, constructed of heat-resistant cross-linked polyethylene (XLPE) polymer, features our patent-pending filter-to-housing interface. Its innovative design minimizes the total number of parts, making for an easy installation. A large, clear sight window allows for hassle-free filter inspection, without having to disassemble your system. This system uses a ribbed bellows silicone intake tube for maximum flexibility and is ribbed to prevent vacuum collapse while maintaining a perfect fit. Stainless-steel clamps are included for strength and durability. A billet aluminum adapter allows you to retain the factory crankcase vent line. This is a direct bolt-on kit that requires no cutting or drilling on OEM parts.