The K&N Universal Clamp-On Air Filter (MPN RU-1048) is a conical clamp-on intake filter sized for universal applications rather than a specific vehicle. It is listed with a 6 in flange, a 7-1/2 in base, a 4-1/2 in top, and a 6 in height. Because it is a universal-fit part, buyers should measure their existing intake tube or airbox opening and compare it against the flange diameter before ordering. Searches for K&N RU-1048 fitment, universal clamp-on cone filter sizing, and 6 in flange performance intake filter will lead to this listing.
Compared with a stock paper element, this K&N filter is designed to be cleaned and reused rather than replaced on a schedule, which is the main reason enthusiasts choose a reusable cotton-gauze style filter. Confirm the manufacturer's current cleaning and re-oiling procedure before purchase, since the cleaning kit and oil requirements are not verified here. Fitment and clamp-style installation details for specific vehicles should be confirmed with the manufacturer, as should any claimed horsepower or airflow gains.
Installation generally involves loosening the existing intake clamp, sliding the filter onto the intake tube, and tightening the clamp so it seals without distorting the flange. Confirm the required tools and any mounting hardware with the manufacturer before starting, and check for air leaks at the connection after installation.
