My car made 340hp and 290lb of torque on a dynapack after my uprev tune. it was pretty much 10hp and 5lbs across the entire curve. My A/F ratio was way rich though and they attributed my gains to that. I also went from 20-21ish mpg to 24-26.
This was all on a Dynapack and with the mods listed below so take that as you will