aFe Power Silver Bullet 46-34010 Chevrolet Throttle Body Spacer In-house dyno testing resulted in max gains up to +7 HP and +8 lbs. x ft. of torque Precision machined from 6061-T6 billet aluminum Serrated/Helix Combination Design for optimum airflow into the combustion chamber Includes all hardware 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.