Callaway SC560 GMC Yukon Denali
The Denali's standard 420 hp is nothing to scoff at. 560 hp is better. The Callaway SC560 GMC Yukon Denali achieves this number by adding a GenThree Supercharger — the same one it uses on the Corvette and Camaro — and a trio of intercoolers to the 6.2L V8. It's paired with a ten-speed automatic and four-wheel drive to get all that power to the road, augmented by options like upgraded brakes, wheels, tires, and handling components.
Photos: Callaway Cars