aFe Power Magnum FORCE 54-20442 BMW 3-Series (E46) Performance Intake System (Oiled, 5-Layer Filter) Produces an additional 6 horsepower and 12 lbs. x ft. torque 5-Layer progressively finer oiled, washable cotton gauze media allows maximum airflow for maximum power Powder-coated heat shield with integrated clip to allow for minimal assembly provide a direct bolt on fitment to the factory air duct Unique coupling smoothes air transition into the 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.