Ok thanks guys, I have had a chat to him, he cant drive manual due to an issue with his left foot so is stuck on Automatic gearboxes only.
He really wants the turbo sound so have passed on your feedback to him.
He is also going to fit an S2000 airfilter which is a drop in replacement for the AUG engine and is meant to give a nice 1-2hp gain.
Where would the best place to buy one? I have put a circle around the type he needs, needs to be an OEM paper one.