HD: Ford Mustang Gt500 "600 HP" vs BMW M5 ECU exhaust race 2/2 HD

and power is around 600 HP. Full event: http://www.m5board.com/vbulletin/e60-m5-e61-m5-touring-discussion/127290-latest-gtboard-supercar-shootout-audi-rs6-lp560-4-997-turbo-997-gt3rs-m5-more.html...