In 2019, Performmaster revealed a 544 kW tuning package for the Mercedes-AMG GT63 S. Now company has released an even more extreme kit for the German super-saloon.

Using an in-house-developed tuning module, the tuner has increased the twin-turbo 4,0-litre V8's peak outputs from the stock 470 kW and 900 N.m of torque to 603 kW and 1 070 N.m. This extra oomph lends the tweaked GT63 S a claimed 0-100 km/h time of just 2,8 seconds and a top speed of 340 km/h.

Alterations to the exterior design are subtle, with the updated GT63 S sporting an "Aersphere" front splitter, rear wing and diffuser. This, says the company, provides the saloon with improved high-speed and cornering stability.

The suspension has also been lowered to create a more dynamic appearance and ostensibly provide extra agility.