If I remember right the car was running around 280 - 290 bhp at the rolling road at the beginning of the year. I am not sure what he has left on the car but I do know that it used to have an uprated intercooler and induction kit fitted to it. He did indeed have a full exhaust system including a decat, it was a tad loud on the rollers. The car had also been lowered 30mmand had a RS clutch fitted but again I am not sure what he left fitted when he traded the car in.
To be honest if all of the above are still fitted there is not really much left to do without starting to spending lots of money