G-Power’s “answer” a similar upgrade that solves the E63 S’ “power deficit”: can you imagine having to live with “only” 612 PS (603 hp) and 850 Nm (627 lb-ft) at your disposal? Joking aside, the tuner didn’t have to look too far to find a Brabus-rivaling upgrade.
That’s because they have been offering a serious power kit for Mercedes-AMG’s 4.0-liter twin-turbo V8 for quite a while now. Launched in the C63 S in October, the upgrade boosts the eight-cylinder engine by 188 PS (185 hp) and 150 Nm (111 lb-ft) to an impressive 800 PS (789 hp) and 1,000 Nm (737 lb-ft) of torque.
The pumped-up E63 S will shoot to 100 km/h from a standstill in just 3.1 seconds before maxing out at more than 300 km/h (186 mph). In order to achieve those significant power and torque gains, G-Power extensively modified the engine’s hardware and software. Responsible for the electronic tuning is the Performance Software V3, which remaps the ECU while leaving the engine protection functions and diagnostic capabilities unaffected.
The key hardware upgrade is the modification of the turbochargers, which include CNC-machine cases and aero-optimized turbine wheels. As a result, G-Power claims the turbos “deliver incomparably better performance compared to the series components.” Other changes consist of the addition of stainless steel downpipes (including a catalytic converter) and a stainless steel exhaust system.
Rounding off the tuned Merc, which you can check out in the following video, is a set of 21-inch Hurricane RR alloys with a jet black diamond finish. In all other respects, the E63 S looks rather understated and features only minor changes such as the black window frames, mirror caps and boot lid spoiler and the black badging.