Originally Posted by Pave Dew
My suggestion fella is view the parts side by side, as I did when I did the swap out.
Further, I have driven a friends 135i with the CDV deleted.
Clutch felt the same as mine with M3 CDV installed.
If in doubt just delete the CDV. I kept CDV as my car is still under warranty.
Ive personally tapped out the restriction in the CDV of the 1M. Its identical to the CDV in a 135.
FYI I have tapped out more than one 1M CDV so it isnt a lone data point in my experience.