The video says 700hp Z but you say 600hp which I would have to agree with you. Then the guy is still brake boosting as you can see the rotors heating up and the BMW takes off early. I am sorry but street racing is stupid for this exact reason. What does it prove? You dont have a time slip, you dont have reactions, 60', 1/8, 1000', 1/4 mile times so there is no proof that you are getting better or that your car is faster. That is just my opinion but what do I know I just help work on a Pro Mod car.