9ff makes its own version of the 911 GT2 RS with 1,200 horsepower.
Porsche aftermarket specialist 9ff has raised the bar once again for street-legal speed and power with an epic 911 GT3 build. The 997-era 911 GT3 features a completely rebuilt engine with added turbos and enhanced aero for one of the quickest custom Porsches yet. 9ff's GTurbo starts with the GT3's 3.6-liter flat-six, then bores it out to 3.9 liters and adds a Garrett GT1200R turbo. The resulting 1,200 horsepower and 848 lb-ft of torque drive to the rear wheels through a 6-speed for a 3.3-second 0-62 time and a top speed in excess of 250 mph.