2008 Shelby Mustang GT500KR - The Royal Treatment
You're Looking at the most powerful Mustang engine ever to come from Ford. It's rated at 540 hp and 510 lb-ft. We observed 511 hp at the wheels on JDM Engineering's Dynojet chassis dynamometer. Horsepower was still climbing when the engine hit redline (6,250 rpm), so there's likely to be plenty more power in there.
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