Ford Racing's announced a 2.3-liter supercharger kit for the 2011 Mustang 5.0-liter V8, which makes a staggering 624-hp and 536 lb-ft of torque. Cost? $7,499. Sorta makes the $18,000 supercharged 550-hp Shelby GT500 option seem overpriced. [MustangsDaily]