Riviera Throttle Body Spacers can keep your Buick looking good. Throttle Body Spacers increase the gap between your air intake and engine block. Durable parts keep your Buick going, check out our Riviera Throttle Body Spacers. Air is added to the combustion cycle more efficiently with Throttle Body Spacers. A new Riviera Throttle Body Spacers will last long. Throttle Body Spacers add horsepower. Get the added benefit of better mpg with a Throttle Body Spacer.