Tag Archives: Kooks Custom Headers

Tech: 1,200-Horsepower Shelby GT500

Big Game

Pro Dyno pumps up John Antunes’ Shelby GT500 with a big-bore 6.2

By Steve Turner
Photos courtesy of Pro Dyno

If you weren’t a Mustang enthusiast, you might assume that a Shelby GT500 with a supercharged 5.4-liter engine would provide more than enough propulsion. We know better. A stock GT500 is fun. A modded GT500 is a blast. However, while most people are happy with bolt-on enhancements and tuning, others want something a bit more aggressive. John Antunes falls into the latter category. Continue reading

Tech: SCT X4 Power Flash

Flash Player

SCT Performance’s new X4 Power Flash offers a number of new features, including wireless updates

By Steve Turner

Photos by Steve Turner and courtesy of Matt Alderman/SCT Performance

When it comes to modding modern Fords, you can’t change much without telling the computer running the show what is going on. If you don’t do so, you are asking for trouble. What that means is tuning your vehicle’s powertrain control module with a handheld flash tuner.

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