Before the 2013 Mercedes C63 AMG Coupe burst onto the scene last month, its predecessor, the 2012 C63 AMG Sedan - was a doozy in its own right.

How awesome was it? It gave tuners like HMS Tuning free reign to give it some serious performance and exterior modifications.

Starting with the latter, HMS Tuning gave the C63 AMG a few added goodies, including a redesigned carbon fiber front bumper with integrated LED lights, flared wheel arches, a new boot lid spoiler, and a rear diffuser. All these items, incidentally, are made out of carbon fiber. Rounding out the exterior mods are a new set of 19" Jade R HMS-Edition black rims.

Now, for the performance upgrade. With the C63 AMG already carrying one of the best 6.2-liter V8 engines in the world, the Mercedes sports sedan is capable of belting out 457 horsepower. Now, add a three-stage supercharger kit and you’ve got a variety of increased outputs to choose from. Stage I develops 625 horsepower and 593 lb/ft of torque, Stage 2 produces 640 horsepower and 620 lb/ft of torque, and finally, Stage 3 peaks at 690 horsepower and 646 lb/ft of torque.[...]