Kleemann CLK 63 Black Series

There's not much we would change about the Mercedes-Benz CLK63 AMG Black Series. Its 6.2-liter V8 produces gobs of power and torque, and the F1-inspired design is a beautiful combination of form and function. Danish tuner Kleemann, however, thinks that it could use some tweaking and has introduced a tuning package that it considers to be a sophisticated optimization. Horsepower has been increased from 507 to 545 via a remapped ECU and an upgraded exhaust system that includes high-flow exhaust manifolds and downpipes with sport catalytic converters. The stock 19-inch AMG wheels have been replaced with 20-inch Kleemann TS-6 3-piece wheels. Finally, the Kleemann logo replaces the standard badges on the trunk. Sophisticated, yes, but whether it's the limited production and possible collectability or the fact that we just like the car as is, we think we'd keep a CLK63 AMG Black Series stock if we had one in the garage and leave any upgrades to the standard CLK63 AMG.