Akrapovic Audi C8 Sound Kit (RS6 Avant & RS7 Sportback)This optional Audi C8 RS6 & RS7 Akrapovic Sound Kit allows you to remotely control your Audi's Akrapovic exhaust system right from the driver's seat. Using Akrapovic 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