Is this it?
If it is I see no mention of anything "adapting", it is simply a reflash of your existing computer for 1999 and newer naturally aspirated Mustang GTs with a manual transmission, Steeda cold air kit, any 3.27-3.55 gears and any legal cat-back exhaust. This calibration corrects the speedometer for gear changes such as 3.55:1 and 3.73:1. This calibration has aggressive fuel and timing curves that compensate for improved breathing with a cold air kit and cat-back exhaust.
If you change anything above or other than that, you get to send your PCM back to Steeda for another reflash. (For a small price I'm sure)
As I said before in another thread, there is NO replacement for a dyno-tune. The simple fact is that every engine is different. Every hp\tq curve is different. Every air\fuel curve is different.
Not only will you see more power from a dyno tune, but your tune will be much safer to the longevity of your engine.
If there's another product I'm missing, please let me know...