The K&N Universal Clamp-On Air Filter (SKU RU-5138) is a versatile air filtration solution designed by K&N Engineering for a broad range of applications. This clamp-on filter features a 6-inch flange, 7-1/2 inch base diameter, 4-1/2 inch top diameter, and 5-inch height, making it adaptable to various intake setups. Constructed with ultra-strong molded pliable rubber flanges, the filter absorbs vibration and ensures a secure attachment. The flange can stretch up to 1/16 of an inch (1.5mm) to accommodate in-between sizes. Washable and reusable, this air filter offers durability and long-term performance, maintaining optimal airflow and protection for engines across multiple uses.

This universal air filter is compatible with a wide variety of vehicles and equipment, including racing vehicles, radio-controlled cars, generators, snowmobiles, and tractors. Its design accommodates different angles and offset diameters of air intakes, providing flexibility for diverse applications. The clamp-on installation allows for easy fitting without the need for direct replacement parts. Ideal for both performance and utility uses, this filter supports street, track, and off-road environments, delivering reliable filtration and enhanced engine protection across many platforms.