The Hummer GT from GeigerCars.de is a sly one with its engine. The six-liter engine is upgraded by the GeigerCars.de engine experts using a supercharger kit and a stainless steel high performance exhaust system including special manifolds and a specially calibrated ECU.
The modifications increase the peak power to 556 bhp while the maximum torque is increased to 565 lb-ft. The road performance is excellent; the heavy SUV only takes 7.6 seconds from 0-60 mph while the top speed is about 140 mph.