2013 Ford mustang shelby gt500 horsepower Source Source Source Source Source Source Source Source Source Source Read Also: 2013 Ford mustang gt500 super snake horsepower 2009 Ford mustang shelby gt500 horsepower 2013 Ford shelby gt500 horsepower 2007 Ford mustang shelby gt500 horsepower 2012 Ford mustang shelby gt500 horsepower Ford mustang gt500 650 horsepower