The intake power numbers I got from aFe. They dynoed it before and after and those were the gains. The intake was super easy to install...20-30 minutes maybe.
I had a friend install the exhaust at his shop. He said the factory exhaust is all one piece. The aFe exhaust comes in 4 sections so no cutting. Oh and this exhaust fits xDrive vehicles.
I'll take a video of the exhaust tomorrow during the day so you can actually see it.