A Ford Mustang Shelby GT500 delivers a total of 760 horsepower and 625 pound-feet of torque – amazing numbers for a muscle car. But what if, with just some simple work, you can increase that final output? This is exactly what the guys over Palm Beach Dyno were able to do with this GT500. It seems that with just some simple work the GT500 can deliver an extra 56 RWHP. Watch the video to find out exactly what they have changed!