When Shelby first launched the GT500 Super Snake in 2007 (or relaunched, if you consider the one-off 1967 prototype), the 5.4-liter supercharged V8 was boosted all the way up to... wait for it... 600 horsepower. Fast-forward just five years and the muscle car landscape looks quite different. The 2013 Shelby GT500 now comes with 662 tire-shredding horsepower from the factory.
Ford Racing has added a new toy to the catalog, the Romeo 605 crate engine. As the name implies this one is built at Ford's Romeo MI engine plant alongside the the other 5.4L supercharged V8s used in the Mustang GT500. This fully dressed crate engine forms the basis of the Shelby Super Snake and the upcoming limited run Cobra Jet drag car. In its current form the engine puts out 605hp thanks to the installation of a new supercharger.
UPDATE: Finally found a pic of the Shelby GT500 Super Snake, although we feel silly for waiting since Photoshop could've (and did) produce the same result. Note the identical pic of the Shelby GT500KR below. The only differences appear to be the center striping, all black side mirrors and a scoop in place of the previous C-pillar window.