aFe Power Magnum FORCE 52-31912 BMW 335i/xi (E9x) Performance Intake System (Dry, 3-Layer Filter/Oiled 5-Layer Filter) Outflows the factory intake by up to 32% . Produces an additional 16 horsepower and 26 lbs. x ft. torque Includes both a 3-Layer non-oiled, washable synthetic media filter and a 5-Layer progressively finer oiled, washable cotton gauze media filter 3-Layer non-oiled, washable synthetic media for the perfect balance of performance, protection and convenience 5-Layer progressively finer oiled, washable cotton gauze media allows maximum airflow for maximum power 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.