It is a bit of a shame BMW does not put the engine in something lighter. Compared to the factory turbo BMW I6's the S63TU is more reliable and easier to hit higher horsepower levels with. We have yet to see what it is truly capable of with monster twins instead of hybrid turbo upgrades.
This F10 M5 does not even have upgraded turbochargers but is running a JB4 with methanol injection and a backend flash tune.
So how does it do? Incredibly well however the owner tends to do very quick honks and jump early. Whether it is cheating or not is up to you to decide.
Run 1: An 800 hp C7 Z06. The M5 gets the lead due to a jump and holds it until letting off. Impressive.
Run 2: What appears to be a stock 458 Italia. The Ferrari is demolished.
Run 3: A turbo Coyote from On3 Performance. Sounds like it belongs to a girl which gives her bonus points except she gets smoked.
Run 4: 5th gen Camaro. Nope. Just nope.
Run 5: A Mclaren 570S although the McLaren doesn't seem to be ready. The car runs 135 stock, this race should look different.
Run 6: 1100+ HP GT500. They say the GT500 is still looking for traction to this day.
Run 7: A 900 hp turbo Coyote. This is the first car to really beat the M5 and pull a bit. They run twice and in the second run the M5 jumps early but the Coyote runs him down.
Run 8: Some 1100+ hp 350Z with who knows what done to it. Sounds like an insane engine swap. It's fast. Very fast.