Mercedes-AMG uses a quite powerful 4.0 liter V8 producing 510 hp for their new C 63 and the AMG GT. According to tuning company Poseidon this isn't enough. They laid their hands on the V8 with an impressive result.
Poseidon started with installing two new turbos. A renewed exhaust system in combination with optimized software result in a power of 610 hp and 725 Nm of torque. This brings the AMG GT and the C 63 S to the same level as the Ferrari 599 GTB and the new Lamborghini Huracán LP610-4. According to the tuner, the top speed increased to 337 kph. That's similar to the top speed of the Mercedes SLR McLaren.