A AF25964 AI Filter, Air, Primary Magnum RS (QTY 1) Shelby Houlihan Is Coming Back: What You Need To Know About Her Doping. One New Aftermarket Filter, Air, Primary Magnum RS (QTY 1) The advanced designs and high quality performance of Fleetguard heavy duty filters give customers the ultimate protection for their equipment. All Fleetguard products are engineered to meet or exceed OEM specifications and ensure engines and other systems achieve maximum life. Cummins Filtration covers the widest range filters in the heavy duty industry. More than a filter company, Cummins Filtration is the only media manufacturer that is part of an engine company. You can have total confidence in your purchase.