aFe Power Magnum FORCE 54-11912 BMW 335i (E90/92/93)/ 135i (E82/88) Performance Intake System (Oiled, 5-Layer Filter) Outflows the factory intake by up to 44% . Produces an additional 17 horsepower and 23 lbs. x ft. torque 5-Layer progressively finer oiled, washable cotton gauze media allows maximum airflow for maximum power 16 gauge, one-piece powder-coated heat shield Heat-insulating molded plastic tubes replace 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.