aFe Power Magnum FORCE 75-80782-0 GM Diesel Truck 01-04 V8-6.6L (td) LB7 Performance Intake System (Oiled, 7-Layer Filter) Outflows the factory intake by 51% . Produces an additional 11 horsepower and 27 lbs. x ft. torque 7-Layer oiled, washable media with 5 layers of progressively finer cotton gauze and 2 layers of synthetic material for high-performance air flow with maximum filtration efficiency, the only filtration media of its kind to be granted a U.S. patent Sealed intake box with auxiliary intake scoop Heat-insulating molded plastic tube replaces the stock intake tract This product is 50-state legal (CARB E.O Number D-550-4)