Constructed with 100-percent polyurethane boxed frame, this high flow, oiled OE replacement performance filter will outflow the stock filter for improved horsepower and torque. Five layers of progressively finer mesh cotton gauze media provide maximum airflow for best performance results. 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 5R Media BMW 320i/323i/325i/328i/330i/M3/Z3/Z4 (E36/46/85) 92-08 L6-2.5/2.8/3.0/3.2L BMW 320i/323i/325i/328i/330i/M3/Z3/Z4 (E36/46/85) 92-08 L6-2.5/2.8/3.0/3.2L