Mercedes-AMG GT Black Series was built by RENNtech

By shawn On 17/07/2022 at 10:14 0

Think 720 horsepower in the AMG GT Black Series is enough? RENNtech doesn’t. The U.S.-based tuner is here to push Mercedes-AMG’s track weapon into an entirely new league.

At first glance this looks like another savage Black Series — but under that long hood RENNtech has built a straight-line rocket: a dry-sumped 4.0-litre twin-turbo V8 with a flat-plane crank now producing a staggering 1,051 bhp and 831 lb-ft of torque.

That output lifts the AMG GT Black Series well beyond factory territory. While a stock Black Series does 0–62 mph in about 3.2 seconds with a 202 mph top speed, RENNtech’s package trims the sprint to roughly 3.0 seconds or less and pushes the governed top speed to an eye-watering 219 mph.

What RENNtech changed

The transformation isn’t cosmetic — it’s all under the hood and in the drivetrain. The key upgrades include:

Bigger, bespoke turbochargers for much higher boost capacity
Dry-sumped 4.0L V8 with a flat-plane crank for faster revving and improved oil control under high g
High-flow stainless-steel exhaust system to reduce backpressure and sharpen the sound
Upgraded air filters & intake plumbing to improve airflow and response
Tuned Transmission Control Unit (TCU) to let the seven-speed gearbox handle the extra torque and optimise shift logic

How it drives

The result is a Black Series that still behaves like the track-focused monster it’s meant to be — but with ballistic straight-line speed. Expect harder acceleration, a louder and fuller exhaust note, and a transmission that holds gears longer and downshifts with more urgency thanks to the TCU recalibration.

RENNtech’s work is a reminder that even the most extreme factory supercars can be dialled up further — assuming you’re comfortable with the tradeoffs (cost, warranty and daily usability).

Read more about the tuner at RENNtech, or explore other high-output AMG builds on our site.

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