Left sports exhaust and right sports exhaust (without tailpipes), incl. 2 connecting pipes, with integrated valves, incl. CE approval Original tube Ø 57 mm = 2 1/4 "- REMUS tube Ø 76 mm = 3.0" Activating the valve on public roads is not permitted according to the EU transport authority. Valve activation can be performed using the separately available REMUS sound controller. The sound controller and electric actuator allow the valve to be operated in 4 different positions.