Originally Posted by Extreme Turbo Systems
To be honest, i'm not 100% sure, but I'm going to have one of my guys look into and get a response back to you. I did a couple quick searches online and it seems that the Y-Pipe is different, so if you want to run the STI TMIC you need to get an STI Y-Pipe as well. I will get confirmation on this though. I do have a customer with our STI intercooler on his Forester.
I had a stock STI intercooler on my Forester and it was an easy bolt on. I had to mod the firewall AC line with a little bending and vinyl hose warp of areas that interfered. I posted above that the stock Forester Y pipe and the stock STI Y pipe are different. ^^ see above.
I now have an ETS TMIC on my 2006 Forester XTI using the stock STI Y pipe and it fits great. The fit of the ETS intercooler is better than the stock STI intercooler.