Silver Bullet throttle body spacers are constructed out of durbable T-6061 billet aluminum and utilize a serrated/helix design that creates turbulence in air flow at the point just prior entry into the engine. This turbulence helps the air/fuel charge burn completely for increased horsepower, torque and throttle response.  This throttle body spacer only works with aFe Stage 2 intakes part number 51-10512, 54-10512, 51-80512 and 54-80512.