Certain elements, such as the exhaust, front air intakes and taillights of the three convertible Bimmers seem different from one another -- though some of that could of course be due to the camouflage -- and the prototype drivers seemed reluctant to be caught in the beginning, which pushed the pursuit up to 160 mph. But the the spy videographers, one of them an administrator at the M5board.com forum, did manage to catch them, thanks to the fact that they were hauling in a G-Power BMW M3 with 600 horsepower.