High Flow Washable Air Filters. Lower Exhaust Temperature. Increase HP and Fuel Mileage.Reference:Baldwin: RS3518Fleet Guard: AF25139MLuber Finer: LAF1849Donaldson: P527682, EAF5069, DBA5069Wix: 46556NAPA: 6556Fits:Ford:Freightliner: Argosy, Century, Classic, Columbia, Condor, Coronado, M2International: 9100, 9200, 9300, 9400, 9400i, ProStarSterling:Western Star:White:We also offer replacement Fleet Air Wraps 3518. *Don't Forget Your Klotz Oil*