This coupe looks mean and growls like an animal.

The Mercedes-AMG GT R might not remain the range-topper in the model’s lineup for long because a new video shows what’s very likely an upcoming Black Series variant testing on the Nürburgring. Whatever the German automaker calls this machine, we can’t wait to hear it growl like this on the road.

Mercededes-AMG Black Series

AMG boss Tobias Moers confirmed last year that Mercedes’ performance division intends to revive the Black Series moniker on a version of the GT. Unfortunately, he didn’t provide very many details about what to expect.

The example on the Nürburgring in this video looks wider than stock thanks to more muscular fender flares. This also allows the fitment on an even wider front fascia with bigger intakes and canards at the corners. A large center-exit exhaust and big diffuser dominate the rear end.

To beat the GT R, we expect the Black Series at least to have the 603-horsepower tune of the biturbo 4.0-liter V8 from the latest E63 S. The mill would easily top the 577 horsepower (430 kilowatts) and 516 pound-feet (700 Newton-meters) of torque from the version of the powerplant in the current range-topper.

The GT R is just arriving in markets like the United States. Mercedes still could be months away from unveiling the Black Series because the automaker wouldn’t want to drive potential buyers away from its current halo sports coupe. When the Black Series GT does go on sale, its price would likely surpass the R’s $157,995 price in the U.S.

Mercededes-AMG Black Series

AMG GT sales are currently down in the U.S. Mercedes has delivered 419 of them through May – a 30.1 percent reduction from 599 in the first five months of last year. In May alone, just 59 of them went to dealers, versus 99 in the fifth month of 2016.

Video Source: Supercarsfromeu via YouTube

Gallery: Mercedes-AMG GT Black Series Video