Universal 6 inch OD-Base 4 1/2 inch OD-Top 7 Inch H Round Tapered Universal Air Filter (KNNRF-1015)K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio controlled cars, generators, snowmobiles, tractors, and other applications. Regardless of the angle or offset diameter of the air intake, there is probably a K&N Universal air filter for your equipment. All filters are constructed with ultra strong molded pliable rubber flanges which absorb vibration and allow for secure