C30 Throttle Body Spacers pack a punch. Throttle Body Spacers increase the gap between your air intake and engine block. All you need is C30 Throttle Body Spacers to take your truck from mild to wild. Air is added to the combustion cycle more efficiently with Throttle Body Spacers. Make it a winner with C30 Throttle Body Spacers. Throttle Body Spacers add horsepower. Get the added benefit of better mpg with a Throttle Body Spacer.