High Flow Washable Air Filters. Lower Exhaust Temperature. Increase HP and Fuel Mileage.Reference:​Reference:Baldwin: RS3740Fleet Guard: AF25435Luber Finer: LAF5722Donaldson: P540388Wix: 46772NAPA: 6772Fits: Volvo: VHD64, VN780, VNL420, VNL430, VNL660, VNL770, VNM420 We also offer replacement Fleet Air Wraps 3740. *Don't Forget Your Klotz Oil*