aFe Power Magnum FORCE 54-11722 Audi A4 Performance Intake System (Oiled, 5-Layer Filter) Outflows the factory intake by up to 38% . Produces an additional max 10 horsepower and 14 lbs. x ft. torque 5-Layer progressively finer oiled, washable cotton gauze media allows maximum airflow for maximum power Durable 16 gauge, one piece powder-coated heat shield Heat-insulating molded plastic tube replaces 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.