Their own video of their audi s1
http://www.mtm-online.de/en/index.ph...subnav=3&id=31
I i was the owner i would fit a new whire harness and new motec ecu
But fit better suspension and brakes.
Better gearbox and i would make carbon fibre copy's of the body panels and a carbon roof couple of other things but i would keep it stock looking.
So i improve it without ditching the caracter of the car.