There is some sort of racing for just about everything that has a motor. And while there might be a limited number of governing bodies for riding lawnmower racing, car racing has a dizzying number of organizations, each with its own set of rules. And that means that even though BMW has already built a version of the M6 to conform to the FIA’s GT3 regulations, a new car will have to be built in order to compete in the IMSA WeatherTech SportsCar Championship. This is a fairly new Championship, with its inaugural season having just happened in 2014. The Championship is actually just the result of the merging of the American Le Man Series and the Rolex Sports Car Series.