aFe Power Magnum FORCE 54-81912 BMW 335i (E90/92/93) Performance Intake System (Oiled, 5-Layer Filter) Outflows the factory intake by up to 20% . Produces an additional 9 horsepower and 14 lbs. x ft. torque 5-Layer progressively finer oiled, washable cotton gauze media allows maximum airflow for maximum power One piece rotomolded air intake tube that snaps onto the factory lower air box Retains your factory ram air scoop 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.