Porsche finally unveils 500-hp 911 GT3 RS 4.0 Limited Edition (Live pictures!)

Porsche finally unveils 500-hp 911 GT3 RS 4.0 Limited Edition. With just 600 units to be produced worldwide, the track-derived sports car uses a 4.0-litre, flat-six engine to achieve maximum power of 500 hp at 8,250 rpm and 339 lb-ft of torque at 5,750 rpm. The powertrain is completed by a 6-speed manual gearbox instead of the German automaker's dual-clutch PDK transmission.