The K&N RP-4660 universal clamp-on air filter uses oiled cotton filter media and a carbon-fiber composite top for strength and light weight. It features a 4.00" inside flange diameter, 5/8" flange length, 5-3/8" base and 5-1/2" height, and pliable flanges that can stretch slightly to fit between sizes. The washable, reusable element offers long service intervals and includes a one-year limited warranty.
K&N Universal Air Filter - Round Tapered 4in Flange ID / 5.375in Base OD / 4in Top OD / 5.5in H