[tom @ eas]

Originally Posted by switlikbob

There are a few solutions out there that supposedly bulletproof the crank hub. I don't remember which vendors, but maximumpsi comes to mind. I'm guessing that anyone who wants 600whp+ out of their s55 is replacing the stock crank hub.

EDIT:

Looks like N54 & N55 engine owners should be scared too, according to Mr. Radowski's website, with tons of pictures:

https://maximumpsi.com/products/maxi...it-s55-n55-n54

And another, but Gintani doesn't mention N series engines:

http://gintani.com/product/gintani-f...-hub-solution/

We have a complete overview of the VTT SplineLock Crank Hub install on the M3/M4 side:

▀▄ eas | VTT "SplineLock" CrankHub Installation Overview for S55
https://f80.bimmerpost.com/forums/sh....php?t=1561598