aFe MagnumFLOW Air Filters OER PDS A/F PDS AMC 61-72 Studebaker 61-64aFe MagnumFLOW Air Filters OER PDS A F PDS AMC 61 72 Studebaker 61 64 Constructed with 100 percent polyurethane on top and bottom, this non oiled OE replacement filter provides years of hassle free service. Three Layers of Progressive Synthetic (Dry) Media for Maximum Convenience. Washable and reusable for multiple cleaning cycles, the tall open evenly spaced pleats provide excellent dust holding capacity for longer service cycle between cleanings.