Three years ago, Mercedes-AMG presented the (then) range-topping model of their GT lineup: the GT R. The GT R Pro followed it at the end of 2018, with enhanced looks and improved mechanics, but the most anticipated version, the GT R Black Series, is still in development.
Marking the return of the Black Series moniker, which was used on hotter versions of the SLK 55, CLK 63, SL 65, C63 and SLS AMG in the past, the track-focused beast was spied both lapping the Nurburgring and calmly cruising the streets around the German track.
Changes compared to the GT R Pro are obvious, even with the vinyl stickers still covering a large portion of its body. The lower end of the front bumper has been redesigned, there are new louvers on the front wheel arches and a rear diffuser with a different look that incorporates quad exhaust pipes. The biggest change, however, is the addition of the huge rear wing, which should improve traction at high speeds.
As the most extreme street-legal car made in Affalterbach yet, the GT R Black Series is set to get an even more powerful 4.0-liter, twin-turbo V8. In the GT 63 S, the current V8 produces 639 PS (630 hp / 470 kW) and 900 Nm (664 lb-ft) of torque. This newly developed V8, which will retain the same block as the M178 V8, is believed to have at least 700 horsepower.
Performance should be mental, surpassing the Pro’s 3.6 seconds needed to dispatch the 0-100 km/h (0-62 mph), and 318 km/h (198 mph) top speed.