I am selling a TurboXS Utec piggyback. It is for a 2004 WRX STI but will fit 2004-2006 STI, Turbo Legacy and Turbo Baja. It has a Stage1 map but can be upgraded. This ECU controller is over $1000 new. I have it in new condition with all the connections, hardware, tools, and software for $600 obo. See attached pic.
I got this straight off of TurboXS's website:
The TurboXS STI Stage 1 kits bumps your stock STI by 15 ft. lbs. and 20 whp for a final output 281 ft. lbs and 285 hp at the wheels. The power increase can be felt as early as 3,000 rpm all the way to redline. The power band is very broad to make for a fun car pulling out of those tights corners your STI was meant to carve. The Kit uses our User Tunable Delta Engine Management System, which gives you control of Boost, Timing and Fuel. A base map is loaded to give you instant gains right out of the box, so it will not need to be tweaked. See Attached dyno pic.