Found a video on the install with dyno run. Just about 80 WHP at the max.
YouTube
As for MPG, I just sold the Audi S4 - 3.0L supercharged and the mileage sucks if you sit in traffic everyday. I could literally watch the gas gauge move. On the freeway using cruise control, I could hit 30 MPG on flat road.
If you want/need/like the power and don't care about MPG, it might be right for you.