fastautos
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Ford Racing just released their 750 horsepower upgrade package for the 2011 Shelby GT500. It's basically Whipple's 2.9L supercharger system:
http://mustangsdaily.com/blog/2010/...he-2011-shelby-gt500-good-for-750-horsepower/
http://mustangsdaily.com/blog/2010/...he-2011-shelby-gt500-good-for-750-horsepower/