K&N Filter Universal Rubber Filter Round Straight 3.5in Flange ID x 5in OD x 8.5in HBrand K&N Engineering Part Number RU 1785 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