Thanks for the Video and the testing Blake
here are my findings as well on the dyno. same day run within minutes of each other.
on my car it actually tapers to the same point and the CS only has more midrange.
BTW this is with 15% ethanol and bad 91 Octane also at 5000ft Altitude.
Numbers are to the Tyre in Kw and Nm
logs from Dyno
Stock Tune
https://datazap.me/u/whoopass/cs-aut...zoom=1155-1361
M4 CS
https://datazap.me/u/whoopass/cs-aut...18&zoom=22-316