aFe Power Momentum HD 54-74006 GM Diesel Truck 13-15 V8-6.6L (td) LML Performance Intake System (Oiled, 5-Layer Filter) Outflows the factory intake by 52% . Produces an additional 22 horsepower and 57 lbs. x ft. torque 5-Layer progressively finer oiled, washable cotton gauze media allows maximum airflow for maximum power Smooth one-piece sealed housing with unique filter to housing interface (patent pending) for easy installation Also features a CAD designed, dyno tuned roto-molded intake tube and an auxiliary 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.