The 2022 Brabus 900 has been unleashed in Germany that ramps up the already monstrous Mercedes-AMG E 63 S output to an incredible 662kW and 1050Nm of torque.
The result is an all-wheel drive hyper-sedan that can launch to 100km/h from rest in just 2.8 seconds and top out at an incredible 330km/h.
Those figures are 0.5sec quicker and 30km/h faster than the stock AMG.
To liberate that level of performance, Brabus committed some serious under-bonnet surgery that has seen the AMG's M177 enlarged from 4.0 litres to 4.5 by increasing both the bore and stroke.
Larger pistons and a new pair of turbochargers, plus a modified intake, were also added, along with a new sports exhaust and ECU reflash.
The new twin-turbo 4.5-litre engine can actually muster 1250Nm, but it's thought Benz's nine-speed automatic and 4MATIC+ all-wheel drive system would have struggled to cope.
Externally, Brabus says it's tried to keep things subtle for a "wolf in sheep's clothing" look, although it's hard not to spot the new splitter, grille, intakes, diffuser and lip spoiler that are all made from carbon-fibre.
There's also the new quad-pipe exhaust and 21-inch rims.
To keep the car stable at high speed, Brabus has modified the air suspension that has seen the E63 S lowered by around 20mm.
Inside, higher-quality leather is used to upholster the seats and is available in a wide range of colours.
Brabus Race paddle shifters, aluminium pedals and illuminated kick plates have also been introduced.
Brabus has not yet revealed full pricing but has announced the Brabus 900's power and mechanical upgrades, plus its styling add-ons, can all be ordered individually for owners who might want the performance but not the look, or vice-versa.