just saw this, still nothing as nice as a 6 cylinder but sounds good:
http://e89.zpost.com/forums/showthread.php?t=575302
also, saw this the other day:
http://youtu.be/SmM0653YvXU
http://e89.zpost.com/forums/showthread.php?t=575302
also, saw this the other day:
http://youtu.be/SmM0653YvXU