The 2013 Ford Shelby GT500 has made a big splash at Ford Canada dealerships. It is also one of the hottest selling muscle cars throughout North America. A big reason for that is power. Car lovers can’t get enough of it, and Ford has really delivered by upping the performance output of the 2013 model to an intoxicating 662 horsepower. Shelby fans were already quite satisfied with last year’s 550-hp engine.