This Turner/Corsa Sport exhaust for the M6 works with the Active Sound to make more growl and rumble so you can actually enjoy the V8 sound. Using stainless steel tubing with their performance muffler design they are able to reduce exhaust restriction compared to the stock system. As well as the tuned exhaust note and drone-eliminating sound, the mufflers use a straight-thru flow design for maximum flow and the least amount of restriction. Decreasing the back-pressure helps the turbos work more efficiently, processing exhaust gases easier and releasing more horsepower and torque. Power gains on the dyno were measured at 13hp and 18ft-lbs of torque compared to stock. Also included is the patented Corsa Reflective Sound Cancellation to eliminate drone (a common problem with most straight-through muffler designs). This system was developed on our own M5 and it makes slightly more burble and throatiness than stock while remaining composed and civilized. The new sound is especially noticeable from outside the car where there is a bit more 'boom' to go with the M6's immense punch.