No, 9ff isn’t a typo error, but a tuner from Dortmund, Germany specialising in Porsches. While names like Gemballa and Ruf are more famous, 9ff’s GTurbo packages for the Porsche 997 GT3 and GT3 RS are bound to get a few headlines.
Let’s take the case of the 997 GT3 RS for dramatic effect. 9ff put a Bi-Turbo conversion to the standard 450 bhp engine with upgrades such as titanium connecting rods and extra strong forged pistons. Three packages are available: GTurbo750 with 750 bhp/850 Nm, GTurbo850 with 850 bhp/910 Nm and the GTurbo1000 with 1000 bhp/940 Nm of torque.
Choose the 1000 bhp option and your Porsche will accelerate from 0-100 km/h in a scant 2.9 seconds. 0-200 km/h is done in 8.2 seconds and 9ff claims that you can technically go on to 392 km/h. To do that, mods like rear fenders with air intakes (for the intercooler) and air outlets in the front fender to reduce the pressure in the wheel wells at high speed are made.
Not many actually want, or can handle, that sort of performance, so 9ff sells an aerodynamic kit for Euro 8,900, and light alloys (fits regular tyres) at Euro 4,890. There are also rims with a central lock system at Euro 5,950.