non of the aftermarket parts for the current dsms will work on it. it has something that is reverse spool. I think its the turbo if thats possible. I have a 90 eagle talon tsi awd and i frequent dsmtalk.com and they all said that the parts would not be interchangable. Plus the ic for the sti is actually pretty big pics at [ www.i-club.com ] and it has water sprayers on it. Sorry im not to technical nor do i feel like looking it up on the internet as im at work. Also the STI has a twin-scroll turbo that produces almost no turbo lag like in the old rx-7 and first gen audi