The Ford GT is on the short list of coolest cars in the 21st century, with up to 600 horsepower, killer retro looks, and Ferrari F430-beating athleticism. Buyers were more than happy to accept a limited edition Ford supercar, but many owners were less than thrilled with Ford's corporate key and fob. While it sounds a bit petty, sharing a key with an F-150 just doesn't scream exotic track star.