BMW's M-Division certainly has the know-how to build amazing cars, and in 2012 it brought the most powerful version in the history of the M6. Largely responsible for the power increase, is the twin-turbo V8 S63 series engine, that is shared amongst a number of BMW models.
The goal was simple; an extremely fast car, that could house 4 people comfortably, whilst still retaining the classic looks and class of a larger BMW.
You can find all the parts for yours on the links below: