Just went to Stage 2 and had it dyno'd:
2007 WRX with AP Stage 2, SPT Package, and Cobb DP w/ hi-flow cat.
Max Power: 221.19 hp (at wheels)
Max Torque: 278.29 ft-lb (at wheels)
Running conditions: 62.32deg F, 29.15 in-Hg, Humidity: 7%
Equipment and software: Dynojet Winpep 7
The torque hits a high in the 2700 to 3700rpm range, while the hp hits between 4500 and 5500rpm.
The numbers fit very well with what Cobb has tested and listed for dyno numbers on STage 2, so A+ to them for a job well done.
With the SPT Intake, the Air/Fuel ratio was a little rich, but was not a major impact on performance. In other words, it did not help or hurt. With a little protuning on the Stage 2 93 map, this could be corrected, but the impact was really insignificant.
All in all, Cobb has hit a homerun for 2007 and the wait was worth it.
Stage 2 puts this little WRX into a whole new ballpark.
I also cannot recommend enough the value of going to Stage 1, as well. Despite the limited increase in numbers, I feel it definitely improves the performance of the vehicle over stock.
Stage 2 is awesome, though!