aFe Power Magnum FORCE 54-12212 BMW 328i (F30) Performance  Intake System (Oiled, 5-Layer Filter) Outflows the factory intake by up to 38% . Produces an additional 11 horsepower and 15 lbs. x ft. torque 5-Layer progressively finer oiled, washable cotton gauze media allows maximum airflow for maximum power One-piece, black powder-coated 18-gauge heat shield and unique (patent-pending) flange retention design that requires no hardware 3 inch one-piece mandrel-bent wrinkle-black powder coated intake tube and bracket 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.