Guess there is no need for E63 anymore.
From the article:
They took the rear-wheel drive version and worked on the V8 4.7-liter turbocharged gasoline engine to bump its output from the series 408 PS (300 kW) and 600 Nm (443 lb-ft) to 550 PS (404 kW) and a massive 830 Nm (613 lb-ft) of...