Has anyone does this already? ..if so, was it a noticeable difference? Is it a worth while venture? Comparing the U.S. WRX and the ones I've driven in Japan, the feel of the car is a little watered down or restricted. This is a mod I want to do however I want to learn if anyone else has done it yet. Anyone?
I bet over half of the WRX/STi owners on here have a reflashed ecu or a piggyback system. Do a search for Cobb's AccessPort.