BMW will offer a performance muffler system with trapezoidal chrome tailpipe embellishers just for the X4 xDrive35i, which will feature two operating modes controlled via Bluetooth: Sport and Track. (autoweek.com)
The internationally largest tuner for vehicles from the Volkswagen and Audi Group has more to offer, though: For example the ABT muffler system which is part of the performance concept and offers the snarling, charismatic V6 sound that is loved by car enthusiasts all over the world. (abt-sportsline.de)
And the automaker wanted to do so without resorting to stereo - enhanced engine sounds or complex (and expensive) multi-mode muffler systems. (roadandtrack.com)