Skip advert
Advertisement

Mercedes-AMG GT R receives almost 650bhp from Fostla tuning

The tuner has upped peak power output to 641bhp – and added a rather bright livery

As if the 577bhp Mercedes-AMG GT R  wasn’t powerful enough, German tuner Fostla has given it even more. Thanks to the brand’s “stage 1” tune and the addition of a BMC racing filter, the track-inspired supercar now puts 641bhp (64bhp over standard) to the rear wheels through its seven-speed dual-clutch gearbox. Torque has also been increased from 516ft lb to 567lb ft, giving the model some extra oomph.

Advertisement - Article continues below

This new power figure brings the GT R in line with the track-focused, all-wheel-drive Huracan Performante, exceeding that of the new Huracan Evo. With the Mercedes-AMG sporting rear-wheel-drive it might struggle off the line in comparison, but flick its fancy GT3-inspired traction control system up a few notches and you might have yourself a surprisingly useable 650bhp.

> Mercedes-AMG GT R review

Performance figures for the Fostla-fettled car haven’t been quoted, however 0-62mph for the standard car comes in a swift 3.6secs with a top speed of 199mph. We’d imagine the addition of 64bhp would help shave some time off the 0-62mph sprint and perhaps even tip the car over the 200mph barrier.

As seen in these pictures, Fostla tuning will also wrap the car in a rather bright vinyl livery to help you stand out, should a 641bhp V8 and ear-splitting exhaust note not be enough on their own.

The Mercedes-AMG GT R received four and half stars in our review, losing just half a star for losing some of its smooth-road composure on the UK’s notoriously craggy roads. This was something to be expected from a car developed at the Nurburgring, however, and certainly wasn’t a deal-breaker. We described it as having “stonking performance” in our review, making us doubt the need for extra power, but should you want to break the 200mph wall, Fostla might be the people to turn to.

Pricing information on the kit hasn’t been announced.

Skip advert
Advertisement
Skip advert
Advertisement

Most Popular

​Best hot hatchbacks 2026 - affordable family-friendly fast cars
Best hot hatchbacks
Best cars

​Best hot hatchbacks 2026 - affordable family-friendly fast cars

The VW Golf GTI Edition 50 and Toyota Yaris Aero Performance breath life into what was an ailing hot hatch segment
16 Feb 2026
The man who traded fighter jets for rally cars, and never looked back
Chris Tolman
Features

The man who traded fighter jets for rally cars, and never looked back

From building BTCC engines to crafting the ultimate Peugeot 205 GTI restomods, Chris Tolman’s journey is one defined by automotive passion and precisi…
15 Feb 2026
New BMW M5 2027 facelift spied – the hybrid Audi RS6 won’t have it easy
2027 BMW M5 Touring spied
News

New BMW M5 2027 facelift spied – the hybrid Audi RS6 won’t have it easy

The LCI update for the BMW M5 will being Neue Klasse stylistic sensibility to BMW’s big garish super saloon
16 Feb 2026