KACS (Koenigsegg Advanced Control System) is a system that enables the driver to adjust the road holding, suspension, aerodynamics and braking components to suit individual preferences. The KACS of the Koenigsegg CCR is set in a standardized, given pattern when delivered. This should only be altered after consulting Koenigsegg for the correct setting, e.g. for racetrack driving, as different racetracks may require different settings.