Renntech tuned 750 horsepower C218 CLS63 AMG takes on a 730 horsepower Heffner tuned Ford GT
Now we are just going by the horsepower figures given in the video as we do not have any dynos to accompany the claims. However, they both are likely accurate due to the result of the race. The CLS63 AMG is able to hang right with the tuned Ford GT and if the race went further it looked like it could pull slightly up top. We do not know the exact list of modifications on either car but the CLS63 obviously has Renntech software and the Ford GT is likely running a pulley, exhaust, and tune from Heffner. Regardless, very impressive result for the CLS63 AMG against stout competition.