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Our first test vehicle belongs to Julia Herbert of Greencove Springs, Florida. It's a 2010 Shelby GT500 that's been fitted with a Whipple 2.9L supercharger upgrade. With the custom calibration from Tony Gonyon at TunersInc, the Shelby pounded the Dynojet rollers with 702 rwhp and 635 lb-ft of torque. Having 600 lb-ft available at 3,000 rpm is ludicrous, but the modified GT500s make it look easy.