Universal air filters are designed and manufactured for a wide range of applications, including racing cars, radio controlled cars, generators, snowmobiles, tractors and other applications. Regardless of the inlet angle or offset diameter, there is a high probability that there will be a K & n universal air filter suitable for your equipment. This universal air filter has a rigid flange for clamping hose connections. universal air filters are washable and reusable. All filters are manufactured with ultra strong molded flexible rubber flanges to absorb vibration and ensure a safe connection, and can also be stretched to 1 / 16 inch (1.5 mm) to match the size between the two. Clean and reusable air filters.