The W209 CLK63 AMG Black Series belongs to BenzBoost member @ecampbell . In race trim it puts out 837 horsepower to the wheels thanks to its 3.0 liter blower and built internals. Very strong, very fast.
In the video it is said to not be running full power but it is on race gas so make your guess as to the output. Regardless, the potential disparity is about 240 wheel horsepower (although likely more due to the M3 being on 91 octane and no meth) and around 14+ miles per hour of trap speed. It shows in the video. For a more interesting race it will take a built motor and bigger blower M3. BimmerBoost happens to know of one.
Enjoy the video.