Before I ruffle too many feathers by calling the 2016 Mustang Shelby GT350R Ford’s fastest ‘stang yet, let me set some parameters. Was the 2013 Shelby GT500 with 662hp quicker to 60 mph and through a quarter-mile? Yes. Could that car out-maneuver the GT350R? Not a chance. Set those two vehicles against one another around any non-oval track in the world and the GT350 would spank its sibling.