Make sure you get the STi Y piece (connects turbo to intercooler) it is a different piece for the STi vs. the WRX last i heard.
I have one that I have decided against, looking to get ~250 for it, I started polishing it but I think I will probably go frontmount, no Y pipe but I have an ebay Y pipe that I could sell you also.
pictures of my intercooler I couldn't get real great pics of my intercooler, the fins are in good shape