Constructed with 100-percent polyurethane boxed frame, 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 filter. Magnum FLOW OE Replacement Air Filter w/ Pro DRY S Media BMW 325i/e/es/ix (E30)/520i/525i/525e/528e/530i/535i (E28/E34) 86-94 L6 (M20/M50/M30) BMW 325i/e/es/ix (E30)/520i/525i/525e/528e/530i/535i (E28/E34) 86-94 L6 (M20/M50/M30)