Interestingly, in my last MP catalog, for part number P4120758, at the end of the description it says “not for street use”.
My understanding is this was sold as a “horsepower saving” package, not factory replacement type package.
Yes, correct. If memory serves (it's been 6 years), original application for the clutch was
a 6 cylinder vehicle, and it is designed to slip and save power.
The 5 blade fan was used on v8 M bodies, and is fine for most apps.
If that is all right, my next step would be to check the 4-series OE part number above to see if it supersedes to
the new OE number you were shipped. I'm thinking it most likely does not
