The Rev S58 Downpipes increase power and torque on your S58-powered BMW while unleashing exotic sounds from your tailpipes.  The Rev S58 downpipes are one of, if not the best all around hardware upgrades for the G8X platform.  The Rev S58 downpipes improve throttle-response throughout the RPM range while stepping up the exhaust note, all without the need to replace the entire catback system on your S58.