Kleemann delivers another ridiculously tuned Mercedes-Benz in the SLK 55K S8. The power is boosted from the normal AMG version at 360 hp to the Kleeman modded one at 550 hp. It gets to 100 km/h in 3.7 seconds. That's one fast roadster. There are oodles of other parts thrown in here but go check out the full story for the minutia. Also there's no price listed. But lets just assume it won't be cheap.