Nearing the celebrated 100hp/liter metric in a naturally aspirated 6.3L V8 is an achievement in itself. For comparison, the Cadillac CTS-V gets 556hp (414kW) from its 6.2L LSA V8, but it does so with the aid of a supercharger. The added power doesn't go to waste, either, hurtling the mid-sized sedan to 62mph (100km/h) in just 3.8 seconds - nearing Corvette ZR-1 territory. That's an improvement of 0.7 seconds over the stock C63 AMG, which is capable of a still-impressive 4.5 second 0-62mph (100km/h) dash.
In addition to the heavily massaged engine treatment, the CK63 raises the speed limiter to 186mph (300km/h) for sanity and safety more than anything. A coilover kit and high-strength limited-slip differential are also added to the CK63 to handle the added demands likely to be placed on the car.
The coilover system is fully adjustable as well, with a stepless height setting and individual damping settings, the driver can tune the car to the precise circumstances of its use, from full comfort to full race. The limited-slip differential is optional, but highly recommended to keep from burning through single rear tires and enhance overall traction.
Though the C63 AMG also features a significantly upgraded aero package over the standard C-Class, the CK63 takes it a step further, optionally throwing carbon fiber versions of the front spoiler, lip, rear spoiler, and all other accessories into play. Lightweight forged wheels in 19x8.5" (front) and 19X10" rear help the car fit enough tire underneath to keep things under a reasonable amount of control, yet weigh 38% less than the stock wheels.
Finally, the interior gets a custom treatment as well, with double-stitched leather, a redesigned steering wheel, and a high degree of individualization available for customers that wish to have a completely unique look.
The package's price hasn't been announced yet, but expect the numbers to match the suitably insane horsepower figures. To see some of Carlsson's previous handiwork, check out its take on the C-Class estate, the SL 500 and the S-Class.