Come on Tone, thats a bit harsh.

I just think that the RST is alot more sensitive to Intercooler configuration that any other car, probably due to the close proximity of the Intercooler to the Radiator and Turbo, with shite airflow etc.

I also wonder if the Pro Alloy cooler simply has flow characteristics that are too good. i.e. The air doesn't spend long enough inside the Cooler to get properly Cooled!