aFe Power Magnum FORCE 51-31752 GM Silverado/Sierra Performance Intake System (Dry, 3-Layer Filter) Outflows the factory intake by up to 32% . Produces an additional 13 max horsepower and 16 lbs. x ft. torque 3-Layer non-oiled, washable synthetic media for the perfect balance of performance, protection and convenience Durable 18-gauge heat shield that utilizes the lower half of the factory air box This kit fits vehicles equipped with an electric fan only This product is 50-state legal (CARB E.O Number D-550-13)