Here is the GeigerCars latest tuning program for the Ford Mustang Shelby GT500 that includes a few styling improvements and a nice power increase. At the exterior level, a couple modifications consist of a new racing chassis and 20-inch alloy wheels from OZ measuring 20×8.5 in the front, and 20×10 in the rear. They come wrapped in high performance Michelin tires, but the most impressive changes to the Shelby Mustang were made under the hood. GeigerCars increased the power to an incredible 810 hp from the 3.3-liter compressor, which is able to develop 1.6 bar of pressure through the 5.4-liter V8 powerplant. With that kind of horsepower figure, you know the Ford Mustang Shelby GT500 had to receive some heavy duty parts.
GeigerCars installed new cylinder heads, extra coolers, larger throttle valves, a new fuel injection system, and increased the air flow to the engine bay. All these upgrades contribute to the 945 Nm of torque accomplished by the Mustang Shelby GT500. The car now has an overall top speed of 354 km/h, which is slowed down by a high performance braking system with 380 mm drilled brake discs, and 6-piston calipers. To put down 810 horsepower to the rear wheels, GeigerCars had to modify the Ford Mustang’s transmission system as well.[Source: carsroute]