Yeah, BL/BP's are fricken odd.
The turbo bends up 90º, and has a flange direct to the intercooler. The intercooler flows left to right, rather than top to bottom, then the outlet goes down, to the trottle body which sit's UNDER the plastic intake manifold. They are all electronic throttle to my knowledge as well.
If you want to swap any of those things to STi, you have to swap ALL things, turbo, intercooler, intake manifold+throttle body etc. But the swap is possible, seen many on the US forums.