When cruising in comfort mode the twin valves remain closed forcing all the exhaust to flow into the large center-mounted muffler, dramatically reducing the volume while retaining a sporty tone. Toggle your drive mode to Dynamic or RS through the stock MMI to open the valves and the exhaust will flow straight through double 3" pipes for the loudest volume possible.
IE's advanced DroneTrap technology is active with the valves both open or closed. The pulse waves that are responsible for the exhaust note are drawn into dual mathematically tuned resonators. The internal ports are engineered to resonate these waves against each other in a process that selectively cancels out those responsible for annoying drones. The remaining waves produce the deepened and enriched exhaust acoustics you love.
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