Why people race to those high of speeds is beyond me.Despite the weight keep in mind the M6 has aggressive gearing, 7 gears, 8,000+ redline and a super fast shifting SMG. Also keep in mind anything can happen, here is a tuned M6 making 480rwhp pulling 4-5 cars on a C6 Z06.
And revving to 8500 is ridiculous, I laughed at that torque "curve" (more like bellcurve) that M6 made.