German tuners GeigerCars has made a reputation building some outrageous special editions from American cars, including Corvettes, Camaros and Chargers. But quality work doesn’t come with a cheap price tag. This special Corvette ZR1 pumps out 730-hp, but GeigerCars says it is completely streetworthy. They upped the horsepower by nearly 100 over the standard 638-hp