They tuned my R33 GTR with Power FC, JUN Cam gears, stock airbox, 3inch exhaust and hi-flow turbos. At the moment its got the boost restrictor removed so its running 14psi. It made 225-230kw@4wheels. Jim advised that the turbos aren't in their effeciency range till above 16psi. As a quick test he ran about 17psi through them and the result was 254kw@4wheels. He reckons the car will make alot more and so next time I go there, they'll fit the Apexi Power FC electronic boost controller, 550cc injectors and retune. There will be no charge for the retune...I'm happy at this boost level anyway but it will be interesting to see what he can safely get from it - aiming somewhere between 260-270kw@4wheels.