While 911s occupy the performance-car pantheon, the GT3 is truly a rolling deity. Its naturally aspirated 3.8-liter flat-six makes 475 hp and spins to a lofty 9000 rpm; the lightning-fast seven-speed PDK transmission helps it hit 60 mph in 3.0 seconds. Handling is tenacious, the brakes are stupendous, and the interior and exterior are modified to suit the track as well as the boulevard. For the ultimate GT3, there’s the GT3 RS. It’s lighter, lower, and its 4.0-liter flat-six cranks out 500 hp.