The 2013 CK63 RSR is a new Carlsson performance flagship, whose powerful
biturbo V8 motor clearly underlines the skill of the engineers at a German town
of Gut Wiesenhof. The Mercedes-Benz CLS63 AMG serves as a starting point.
Months of careful development and testing have resulted in the headline numbers of 700 hp (515 kW) at 5,700 rpm (specific output 128.2 hp/L), with 738 lb-ft (1,000 Nm) of torque between 2,000 and 4,500 rpm. Peak torque is electronically limited to 738 lb-ft (1,000 Nm) to preserve the gearbox and drivetrain. The significant increase in output requires a more efficient intercooler system to lower charge air temperatures, as well as additional water and oil coolers to mitigate the increased thermal load. The seven-speed transmission is fitted with an additional, thermostatically-controlled oil cooler.
Against the stopwatch, the Carlsson CK63 RSR reaches 60 mph from rest in just 3.8 seconds, passing 200 km/h in 11.6 seconds on its way to a calculated top speed of 211 mph (340 km/h).
The 2013 CK63 RSR uses a specially developed high performance stainless steel sports exhaust incorporating 200-cell metal catalytic converters to further reduce back-pressure. This exhaust system also incorporates an electronically controlled sound valve, giving the driver the choice of a near standard sound level for civilized progress through urban areas, or a full-on, snarling muscle car V8 experience at the touch of a button.