Choose aFe's Silver Bullet Throttle Body Spacers for quiet, efficient and responsive power. Give your pickup truck, suv or car dyno proven results with an aFe Silver Bullet Throttle Body Spacer. aFe Silver Bullet Throttle Body Spacers are precision machined from solid T-6061 billet aluminum for exacting specification for optimal results. aFe Silver Bullet Throttle Body Spacers are only available for applications that show dyno proven results. | aFe Silver Bullet Throttle Body Spacer 46-30004