The regular Mercedes-AMG GT 63 was already a quick four-door, but one Qatari owner has taken things much further to create what is believed to be the world's quickest example of the luxury sports sedan. The regular version - not the hybridized GT 63 S E Performance - produces 630 horsepower and 664 lb-ft of torque, but the example you see here is far more ludicrous, with the 4.0-liter twin-turbo V8 boosted to a claimed 1,331 hp and 886 lb-ft.
As a result, the car manages a Dragy-verified 0-62 mph time of just 2.6 seconds and can do 62-124 mph in only 4.35 seconds (although we must admit that no Dragy time sheets were provided at the time of writing). As you can imagine, what lies beneath that vented hood somewhat differs from what was there when the car left Affalterbach.
Turbo Technic Hamburg supplied a pair of uprated turbocharged while Spool Performance provided upgrades for both the low-pressure and high-pressure fuel pumps. A Blackboost air intake helps the car inhale better, while catless Red Star Exhaust downpipes and a custom titanium exhaust system help that V8 exhale more freely. A methanol injection kit keeps temperatures and octane levels in check, and all of this is brought together with a comprehensive retuning regimen that results in around 1,000 horses being transmitted to the wheels.
The wheels, brakes, and suspension appear unchanged, as does the cabin, but the car's exterior certainly matches the hopped-up nature of the engine bay.
A custom, vented carbon fiber hood with numerous vents is balanced by an unusual rear wing, and most of the badging has been blacked out. Some yellow accents have also been added to match the color of the calipers, but the biggest change is the color of the car itself. The body has been painted in what at first appears to be some sort of variation of Nardo Grey, but it's actually a sky-colored hue called Meissen Blue.
While this is not the neatest GT 63 we've ever seen, it's a lot more powerful than some other tuned examples that have come across our screens, and it's nice to see signs of wear on the car, showing that the owner uses it regularly. With Mercedes downsizing more cars every minute, V8-powered beasts like these may soon become scarce, so enjoy seeing such monsters while you can.