Very interesting, and good to see. Thanks. I'd like to see something along the lines of airflow numbers if they're available, as opposed to dyno graphs. Dynos tell a part of the story, but not all of it.
Would you happen to have graphs available for earlier model WRX/STIs? I don't recall ever seeing any graphs like that pertaining to any earlier models, I'm sure they're out there somewhere though. I wonder if the changes in the intake were drastic enough with this last generation to make it that much better to have an intake installed.
Cobb's dyno numbers with regards to AEM intakes are a bit different. Granted, they only show max percentages gained though. 93 Octane for 2011 WRX Stage 1 with AEM: 16.6% HP and 21.2% tq gains, and stock intake: 13.5% HP and 17.3% gains.
Now, I haven't gone in and looked at the details of the mapping, these can differ quite greatly where things count, so there's no real knowing of what is the intake and what is tuning, but there is an obvious showing of improved gains with an intake at least with newer models. Cobb has only recently began supporting tuning for differing intakes, so older models will most definitely vary with regards to gains.