aFe Power Magnum FORCE 54-81012-C BMW 3-Series (E9x) Performance Intake System (Oiled, 5-Layer Filter) Outflows the factory intake by up to 56% . Produces an additional 12 horsepower and 15 lbs. x ft. torque 5-Layer progressively finer oiled, washable cotton gauze media allows maximum airflow for maximum power Plastic housing features auxiliary inlet duct as well as an attractive black vacuum formed plastic carbon fiber finish cover Heat-insulating molded plastic tube replaces the stock intake tract This product is not CARB exempt at this time and is not legal for sale in California or use on vehicles registered with the California Department of Motor Vehicles.