Originally Posted by BoostedBMW
Haha... actually, right now I have zero rasp.
I'm going to leave the OEM exhaust (at least for the time being), so I can't speak to the whole "turbo-back" experience.
I do notice a slightly more raspy sound on start-up when I have the door open. When I'm in the car, with doors closed and windows rolled up, I barely notice a difference in sound (which in good IMO).
I'd suggest finding someone with DP's installed, and do a quick cat-back swap to see the difference.