Originally Posted by CoolRex
I think the swap is not going to work. You are going to run into issues with the speed sensor.
If I'm right you need a different front bell housing for your speed sensor.
I don't know about this. His speed sensor comes from the ABS right? I'm relatively certain the 08+ cars do not have a VSS in the trans. So he should be able to just leave the 05 STi VSS in the trans to plug the hole and the car will run normally. This is the case with the 08+ sti's at least... where do the 08+ WRX 5MT's get their speed readings, that's the question. If it's from somewhere not involving the transmission, he's good to go then.