Originally Posted by anerbe
To my understanding, chipping the c63 unleashes the full 500 hp.
Driving a stock one... Already an Absolute beast. Ridiculous. I think it may take more then a tune/dp only N54 to take it. They really impress me.
with the ecu, exhaust , intake , header and all the goodies, you can probably add almost up to 100HP without adding supercharger/turbo.