aFe MagnumFLOW OE Replacement Pro DRY S Air Filters 09-12 Porsche 911 (977.2) H6 3.6L/3.8LConstructed with 100 percent polyurethane base, 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. Integrated urethane bump seal insures tight, no leak seal over the life of the