Originally Posted by oldskoolWRX
if it's a turbo baja. bypass the sti ecu. just tune what you have. either an ots cobb stage two map, or a rom raider drop in. or custom tune. price depends on who does it (dyno/street tune, cobb/open source). the baja is essentially the sti engine, minus forged rods. everything else is interchangeable. dont forget catless up-pipe.
Pretty much what I'm trying to do (to start off with) is make as much horsepower as a stock STI. So won't I need the STI ecu in addition to the turbo, intercooler, and up-pipe to make about the same amount? Granted, there are other ways to make this HP but aren't these 4 components my easiest method?