Instragram post by @ecutuninggroup:
BMW M6 2014 Gran Coupe tested by @smokeysgroup. The car made 690.2 hp 729.5 lb-ft with the tune — to the wheels — on a stock car. The graph shows the power dropped slightly, due to the car struggling with traction on the dyno. By adding 15% power train loss, this car hits 800 hp effortlessly.