I posted here about 2 months ago trying to figure some things out about the 07 STi I recently bought. I bought it with some after market parts already installed: An unmarked TBE with the down pipe wrapped up and an Injen cold air intake.
After reading up, and still not completely understanding, one thing I do understand is that my car needs to be tuned after these parts being installed. A couple questions I have are, first of all, what would be the best way to tune with the parts I have installed. Also, what stage would my STi be considered?