make sure you pull the manifold that the egt is going into to make sure that you don't get any drill shaving in the turbo. Russ
If it was a WRX I'd say throw it in #4, since that's the one that everyone seems to blow up (unequal air flow and fewer cooling passages). But on an STi I bet the runner flows more evenly and you get consistent temps from cylinder to cylinder. That's just a guess though.
i was thinking about doing the drivers side, it has to be way easier to get at. should i be replacing the gasket? at 10k?? some one also mentioned installing it on the connecting runner, by a dimple. i am guessing this entails pulling both sides?
The drivers side is easier because you don't have to deal with the uppipe. I would replace the gaskets (header to head, and header to crosspipe). It is easy insurance. I think I places mine right where the 2 runners come together (about 4-5 inches from the head). Basically you want to get it about 4-5 inches away from the head. I think I have some pics, I will look for them. Russ
