K&N Universal Round Tapered Carbon Fiber Air Filter 6in Flg ID Centered/7.5in B OD/4.5in T OD/4in HThe RP 4600 Universal Air Filter is constructed from an oiled cotton filter media. It comes with a carbon fiber top for strength and durability. The carbon fiber element adds to the light weight design and gives this filter a smooth glass like finish. The RP 4600 is a clamp on filter that has an inside flange diameter of 6 inches and a flange length of 1 inches. The base is 7 1 2 inches and the filter height is 4 inches. This Part Fits: Year Make