The Mercedes-AMG GT Black Series is a track monster but RENNtech’s R3 upgrade package is here to make it even more powerful and extreme, for AMG owners who can’t settle with factory power.

RENNtech is no stranger to the Black Series since it has offered upgrades for the CLK, SL 65, and SLS, before moving on to the fastest and most powerful AMG GT. Back in 2018, they also offered a tuning package for the AMG GT R, resulting in the fastest Mercedes at the Nurburgring at the time, before the stock AMG GT Black Series upped the game with a lap time of 6:43:616 in 2020.

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Visually, the Black Series was already a thing to behold, with motorsport-derived aero components all around the bodywork. The tuner added Machine Black wheels – similar to the matte black bodywork – with contrasting orange accents. Other upgrades include the color-matching rollbar, the addition of four-point seatbelts from Sabelt or Schroth, and a fire extinguisher, features similar to the factory options in the EU-spec model.

The most important changes happen under the bonnet. Besides upgrading the ECU software, the tuner added a new pair of turbochargers, stainless steel downpipes, blow-off valves, and BMC air filters. As a result, AMG’s twin-turbo 4.0-liter V8 produces an impressive 1,051 hp (784 kW / 1,066 PS) and 831 lb-ft (1,127 Nm) of torque, up from the stock 720 hp (537 kW / 730 PS) and 590 lb-ft (800 Nm) of torque. RENNtech claims this is the most powerful Black Series in the world, although Opus Automotive – previously known as RENNtech Europe – advertised an even higher output of 1,111 hp back in 2021.

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In any case, power is transmitted to the rear axle through a seven-speed dual-clutch transmission which has also received new software for faster shifting alongside an upgraded performance clutch to handle the monstrous torque. When fitted with the R3 upgrade, the AMG GT Black Series accelerates from 0-60 mph (0-97 km/h) in 3.0 seconds, while the stock car needs 3.2 seconds for the 0-62 mph (0-100 km/h) sprint. Top speed has also been increased, from the standard 202 mph (325 km/h) to 219 mph (352 km/h).

RENNtech’s Mercedes-AMG GT Black Series R3 is already available in the US, Europe, and the Middle East. We don’t know the cost of the upgrades but Black Series owners must have deep pockets anyways.

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