Another x-pipe exhaust question, but need technical details

[Professor]

Just got off the phone with my custom exhaust shop. They are a very high tech shop that work on some very custom vehicles. They said it would be $150 for the xpipe and install. Sounds very reasonable to me.

I'm getting so much different info on this site through the search function as to the placement of the xpipe. A few are saying they lost power and tq. because of improper placement. I definitely don't want that to happen.

If that is the case, then I want to know where the proper placement is. I know the shop i'm dealing with knows what they are doing but I'm betting they haven't done to much with X5's.

The video I saw of an install showed the x pipe placement more toward the front of the of the vehicle with the extention pipes coming off and going toward the back. is that proper placement?


Does anyone who has this done without issues have a pic?
Also, does this throw any CEL lights?
thanks
Matt