depends on the year but you just have to cut a certain wire and some other things and deal with the dccd light on all the time! but im def. doin this to my car soon!
There is a wire you should "pin out" not cut. From what I have read, if you don't remove the wire from the harness, it will blow a fuse.
The 04 STi one will plug in, but it will more than likely continuously blow a fuse unless you take a certain wire out of one of the connectors. I don't remember which one, but if you search nasioc you will find it.
Yep, 04sti is NOT plug and play. There is a HUGE thread on nasioc about it from 4 years ago. There is definitely 2-3 wires that need to be moved and/or removed from the harness. Russ