If this helps give you an idea, I went against a 2010 P31 C63 and we were next to each other neither was able to pull away. Literally the mirrors where next to each other up to 130 and then we braked.
My car has:
MS stage II intake
MS UD Pulley
Gintani catless x-pipe
Innotech rear exhaust
OE ECU Tune (I think it's a bit more aggressive than Dinans)
Used S6, I think it was a 35 roll.
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