Akrapovic BMW G09 XM Exhaust Sound KitThe Akrapovi Exhaust Sound Kit for the BMW G09 XM enables owners to control the sound of the system from the cockpit of their machine. Using Akrapovi technology, drivers can easily switch between the quiet mode and a sportier sound. With the use of a receiver (already included in the evolution system) to drive the actuators that open or close the valves at the end of the exhaust system, drivers can use the Sound Remote Controller or the new smartphone