The new Ford Mustang GTD Competition has set an incredible Nürburgring Nordschleife lap time of 6:40.835, making it the second-fastest American car.Not only did the pre-production Competition beat the GTD's previous time by over 11 seconds, but it also beat the Chevy Corvette ZR1X's time by eight-plus ticks.The Competition-spec Mustang is an enhanced GTD model with more aero add-ons, more power, less weight, and grippier tires; Ford will sell a limited number.