Had the guys at Kleemann install some go fast parts on the clk55:

P/P heads
Ti-Retainers (for high revs)
170 deg therm
Quaife LSD
Zietronics Wideband O2 Setup / Dashdaq display

Dyno's stock @ 290 Rear Wheel HP
Dyno's w/Mods @ 472 Rear Wheel HP / 481 Rear Wheel Tq

Hoping to knock down some mid-high 11's on D/R's next time to track.

Best part about this combo is 400ft-lbs by 2250 rpm... pulls like a monster on the street.