Already boasting of 622 horsepower and 468 pound-feet of torque under its hood, the Mercedes-Benz SLS 6.3 AMG Black Series has all the credentials of a blue chip supercar. But alas, German tuner mcchip apparently wasn’t satisfied with the output of this über sedan. So the tuner went about the business of building an engine upgrade for the SLS 6.3 AMG Black Series. By the time it was done, the supercar now touted an output of 654 horsepower and 479 pound-feet of torque. Incidentally, those torque numbers are now equal to that of the SLS AMG GT.