How to pressure test intake for leaks in WRX 04
 

I have some leak, probably in my intake. What is the good way of pressurizing intake to find any leaks and don't break anything?
I read somewhere that you have to know which pipes should be clamped or disconnected if you are pushing pressure directly to your TIP (in place of MAF) and this differ between stis and wrxes and also between wrxes on different markets. Do you know what should I clamp or remove in EU spec?
Maybe a better idea would be to pressurize directly Y-pipe. Is it possible to do it without removing TMIC?