Starting in 2008, previous 2007 Shelby GT500 Mustangs could be sent to Carroll Shelby's Special Performance Plant in Las Vegas to be rebuilt into a Super Snake, which resembles the 1968 GT500KR, for an additional cost of $27,995. The Super Snake will offer a 605 hp 5.4LEaton roots type supercharged version with warranty.
A Kenne Bell twin-screw supercharged version with "over 725 hp" will also be available, without warranty and a 0-60 time of under 4 seconds. The Super Snake is inspired by the 1967 GT500 Super Snake, a car made by Carroll Shelby for Goodyear Tires.
Roush Performance, established by former Ford engineer Jack Roush in 1988, had been known for providing performance parts, vehicles and engines. The company introduced three packages for the Mustang.
Stage 1 came with 17-inch (430 mm) wheels, a lowered suspension and a side-mounted exhaust system. In addition, it came with an air dam, side skirts and a rear spoiler. Stage 2 was an upgraded Stage 1 with 18-inch (460 mm) alloy wheels and BFGoodrich Comp T/A Tires.
The suspension was extensively modified with Bilstein shocks, High-rate springs, stiffer anti-roll bars and new control arms. Roush claimed it achieved 1.0g lateral acceleration and was on par with the Porsche 911 Turbo. Both Stage 1 and Stage 2 came with V6 or V8 engine options. The top of the line was the Stage 3, with 360 hp (268 kW) and 375 ft·lbf (508 Nm) of torque.
The Stage 3 platform was essentially a heavily modified Mustang GT. The Ford 4.6 L V8 was upgraded with an Eaton supercharger, a new intake manifold, high performing fuel injectors, an air-to-water intercooler and a lighter flywheel (on the manual transmission only).