Yea I meant fibers. I use Barnett steels. I cant seem to find out which oem clutch is the "583", and I'm not at the shop where I can look at the package. I don't know if the FZR is the one we run with the 8 plate, that may be the 7 plate or 10 - 12 plate, can't remember. I think any will work through. Just have to adjust the pancake bearing accordingly for the thickness.