Have fun upgrading your Catalina Throttle Body Spacers. Throttle Body Spacers increase the gap between your air intake and engine block. Make it feel like South Beach by improving your Catalina Throttle Body Spacers. Air is added to the combustion cycle more efficiently with Throttle Body Spacers. Go all out with new Catalina Throttle Body Spacers. Throttle Body Spacers add horsepower. Get the added benefit of better mpg with a Throttle Body Spacer.