Shelby is offering the upgrades to existing owners of unmodified cars. The Super Snake will pump out 630 hp for the base configuration or 725 hp with the optional setup. Further changes under the bonnet include an upgraded intercooler, cold air intake system and radiator. A 630 hp version uses a Borla cat-back exhaust, while 725 hp version uses a JBA unit.
Handling upgrades are simply Ford Racing suspension components with adjustable dampers, stiffer springs, thicker antiroll bars, a front strut tower brace and 20-inch Super Snake wheels with Pirelli P-Zero tyres. Baer six-piston front calipers with cross-drilled rotors are fitted at all four corners.
External features include a hood with a larger scoop and vents, striping decals, rear quarter window scoops, and carbon-fibre splitter and side sills. The interior features seat headrests with embroidered Shelby logos and carbon-fibre gauge faces.
Additionally, the Shelby SR package for the 2005-2009 Mustang GT pumps power up to 550 hp, with the help of a Ford Racing supercharger and Borla exhaust.
Handling mods include an Eibach suspension with coil-over shocks, struts, pro sway bars, bump-steer kit, improved lower control arm bushings and caster/camber plates, and a Watts Link suspension. Lighter 18-inch aluminium wheels come with 275/35 BF Goodrich R compound tyres. Brake involve Baer six-piston front and rear units.
