Lexus will unveil a new F performance model at the 2014 Detroit Auto Show.

F is Lexus' equivalent of BMW M or Mercedes-Benz AMG, but so far it's been having trouble gaining momentum. The only production F model so far is the long-in-the-tooth IS F, although Lexus does offer a full range of milder F-Sport models.

That will change at Detroit when this mystery model is unveiled. Lexus is keeping the details under wraps; so far all we know is that this car will have nice-looking wheels and side vents similar to the ones on the current IS F.

The car could be an F version of the IS-based RC coupe unveiled at the 2013 Tokyo Motor Show. Several details of the car in the teaser image, including the visible bit of the headlight cluster and the line running from the headlight over the top of wheel arch, appear to match the RC.

An RC F could pack a high-horsepower V-8 like the one in the current IS-F, giving Lexus a competitor to the BMW M4, which will also be unveiled in Detroit.

Another possibility is a Lexus competitor to the M5. Lexus has long been rumored to be developing a GS F, and a camouflaged GS was seen testing at the Nürburgring back in September. The GS F has been rumored to be powered by everything from a supercharged V-8 to a de-tuned version of the LFA supercar's V-10, but a 5.0-liter naturally-aspirated V-8 seems more likely.

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