Go to the edge with new Frontier Throttle Body Spacers. Throttle Body Spacers increase the gap between your air intake and engine block. Frontier Throttle Body Spacers will have your car stylin'. Air is added to the combustion cycle more efficiently with Throttle Body Spacers. A great way to upgrade your car is with Frontier Throttle Body Spacers. Throttle Body Spacers add horsepower. Get the added benefit of better mpg with a Throttle Body Spacer.