Dubbed the lightest, fastest and most aerodynamic FX yet, the concept is based on the 50S Premium and features engine and suspension tuning by Red Bull Racing.

[UPDATE 12.09.2011] New photos and video added to article.

Infiniti has released new details about the Sebastian Vettel FX concept.

Designed for the Autobahn, the concept is based on the FX50S Premium and features engine and suspension tuning with input from Red Bull Racing. Specifications weren't released, but Infiniti hinted the model has a top speed of 300 km/h (186 mph).

On the styling front, the crossover has an aggressive front fascia, a carbon fiber grille and LED daytime driving lights. Out back, there's a tailgate-mounted spoiler, a dual exhaust system and a rear diffuser.

The concept will be unveiled on September 13th, at the Frankfurt Motor Show, so stay tuned for additional information.

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