K&N Universal Rubber Filter 2-1/16in FLG 3-1/2in OD 4in HBrand K&N Engineering Part Number RU 0500 Category Air Filters Air Filters Universal Fit Condition Brand New Original Manufacturer Packaging 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