After over a year of waiting, German tuner firm 9ff has finally released new details and updated photos of their impressive 9ff GT9-R. The 1120 horsepower car will be limited to twenty units, each available worldwide.

Using a 4.0-liter six-cylinder Boxer engine, the car is capable of a 0-100 km/h time of 2.9 seconds. 300 km/h is reached in 15.8 seconds, en route to a 414 km/h (257.2mph) top speed. If accurate, the 9ff GT9-R would become the fastest production car built, beating out the 412.28 km/h (256.2mph) posted by the SSC Ultimate Aero TT, despite a pending second world record run by Keating TKR, which has already hit 418.6km/h (260.1mph)

Those who do not need quite that much power can take a 987-hp model built for the track, and just a hair slower than the fully tuned car. Still, there is a 750-hp version on offer that clears 300 km/h (186.4mph) in 20 seconds.

The engine is mated to either a six-speed manual or sequential gearbox. The five-speed Tiptronic is an option for those purchasing the 750-hp variant.

9ff claims no two vehicles will be identical, with a full slate of customization available on the street legal car. Multiple aerokits are being made available to guarantee this.

Pricing was not revealed on the 9ff GT9-R, but if you have to ask, you can't afford it.