aFe Power Magnum FORCE 51-11973-B Ford F-250 / F-350 Performance Air Intake System (Dry, 3-Layer Filter) Produces an additional 18 horsepower and 22 lbs. x ft. torque max gains 3-Layer non-oiled, washable synthetic media for the perfect balance of performance, protection and convenience Black heat shield snaps onto the top of the lower half of the factory air box Wrinkle black powder-coated aluminum 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.