Dyno Tuned at Yimi Sport in Santa Clarita.
08 Spec B (3,500 miles)
Completely stock down to paper filter it dynoed at 236 whp 261 wtq (their 08 STI dynoed at 235 whp stock). I am surprised at the stock numbers.
With open source tune it dynoed at 243.78 whp 281.50 wtq. Increase is mild but power comes on much stronger, much sooner and much smoother.
I will post up the sheets soon.