Big bang for the buck with F250 Throttle Body Spacers. Throttle Body Spacers increase the gap between your air intake and engine block. Revitalize your truck with new F250 Throttle Body Spacers. Air is added to the combustion cycle more efficiently with Throttle Body Spacers. Be a little different with new F250 Throttle Body Spacers. Throttle Body Spacers add horsepower. Get the added benefit of better mpg with a Throttle Body Spacer.