888-695-1728 The muscular high-performance exhaust system peeks out through a central dual-pipe design at the rear of the vehicle. It is tuned to deliver a confident growl under power. In addition, to help make sure you hear that rumble of excitement coming from under the hood, the 2013 Ford Focus ST is equipped with a sound symposer box. It is designed to enrich the natural sounds of the vehicle by capturing internal engine oscillations and piping them through the interior.