Dyno-Tested: 2011 Porsche 911 GT2 RS

That's 580 horsepower and 518 lb-ft as measured at the wheels on California's "premium" 91 octane. Yeah, all the ponies are in the stable. And how. Torque hovers right around 500 lb-ft from 3500 to nearly 6000 rpm and barely tapers off as it runs into the fuel cut, resulting in a crushingly wide and flexible powerband.