Keeping a lid on details about the 2011 Ford Mustang GT's new 5.0-liter V8 is proving futile for Ford thanks to the magic of the internet. For instance, we now know that the five-oh V8's 412 horsepower come in at 6,500 rpm. And the torque rating is 390 pound-feet -- up from a mere 325 on the 2010 Mustang GT.