The K&N RU-5060 is a red, round-tapered universal clamp-on air filter from K&N's High-Flow Original line. It uses cotton gauze media with a tacking agent, which the manufacturer says is designed to block and trap contaminants while supporting better airflow. Its 4-inch centered flange, 6-1/2-inch base, 4-1/2-inch rubber top, and 6-inch height suit custom intake tubes and aftermarket cold-air setups where a stock panel filter does not apply. The element is washable and reusable, so you avoid repeat disposable-filter purchases, and the manufacturer backs it with a one-year limited warranty.
This filter makes more sense than a cheaper disposable paper universal when you want a long-term intake upgrade. The rubber flange is designed to absorb vibration and hold the filter securely, and the manufacturer's universal-filter notes say the flange can stretch up to 1/16 inch to fit between sizes. Because the manufacturer lists it as a universal part, not a vehicle-specific one, confirm the 4-inch inside diameter against your intake tube before ordering. Search terms this part targets include K&N RU-5060 universal filter, 4 inch flange clamp-on air filter, washable cotton gauze pod filter, and reusable high-flow universal intake filter.
The manufacturer lists it as a universal-fit filter designed for a variety of applications, so it is not built for one vehicle. Match the 4-inch flange inside diameter and intake dimensions to your existing tube or adapter.
The manufacturer specifies a re-oiling amount of 1.33 oz (39 ml).
According to the manufacturer's universal-filter notes, the molded rubber flanges can be stretched up to 1/16 inch (1.5 mm) to fit between sizes.
Installation is a clamp-on job rather than a bolt-in one. Confirm the flange fits your intake tube, slide the filter onto the tube, and tighten the hose clamp so the flange seals without distortion. Use the manufacturer's stretch allowance of up to 1/16 inch only for minor sizing differences. For cleaning, wash the element and re-oil it using the manufacturer's 1.33 oz (39 ml) quantity. The manufacturer's general intake guidance describes securing the filter with a hose clamp; a screwdriver or nut driver is typically all the hardware requires. Verify tools and steps against the manufacturer's documentation before you begin.
