The BMW N54 twin-turbo engine is a true factory-made beast, but Akrapovic's engineers developed a special aftermarket downpipe system for it, which makes the N54 even better. These down pipes are designed for drivers who demand more power and less weight. In addition to a weight reduction and a power gain, one of the tasks of the Akrapovic team was also to make the sound of the N54 become music to ones ears.
$1650 + shipping
These will ship in mid to late December.
http://hpashop.com/Akrapovic-Stainle...ipe-e82-1M.htm
