Race ahead with new Fiero Throttle Body Spacers. Throttle Body Spacers increase the gap between your air intake and engine block. Fiero Throttle Body Spacers are easy to upgrade. Air is added to the combustion cycle more efficiently with Throttle Body Spacers. Only the highest quality goes into Fiero Throttle Body Spacers. Throttle Body Spacers add horsepower. Get the added benefit of better mpg with a Throttle Body Spacer.