Finally had a chance to strap some GoPros onto my new X5 40i with the M Performance Exhaust installed. Inside videos taken from as close to where your head will be as possible. Outside videos taken from bottom center of the rear window looking straight down (sorry, didn't feel like taking the bike rack off for these. LOL). Inside/outside videos are the same stretch of road in each.
Cold startup from inside.
Cold startup from outside.
Comfort mode acceleration/driving inside.
Comfort mode outside.
Sport mode acceleration/driving inside.
Sport mode outside.
Hope those help in some way! Oh, and I almost forgot... in my opinion, this sounds amazing and I totally love it.