Originally Posted by builthatch
i dunno about the WRX but the new STI stock vs. stage 1 AP flash, all else stock, is a completely different car. like, not even close. driveability, fuel mileage and overall performance are improved to varying degrees. i could never ever in good conscience recommend not doing it and it's hard to believe how terrible the car performs with that stock tune vs. that flash. like a whole different car.
but hey, that's an STI, like i said i dunno about the WRX.
I'm going to wait at least for the break-in period to be done before I think about flashing my STi