I have a JDM spec STi V4 motor being swapped into my US 2.5RS, and after speaking with MRT this weekend (Brett was here in the states), he recommended my next mod be a bigger intercooler. I am using (for now) the VF22 turbo, but plan on swapping to a bigger one, as well as a LINK (using Bob Rawle's guidance) in the future.

 

Have a another chat with Brett, as they can supply an uprated one.

I think the MRT one is available from

 

Also try