904 race builds

I don't have a bolt-in sprag. I didn't watch the whole video but I saw the oil hole part.

The factory didn't feed constant oil to that area for the OE press-in clutch. Perhaps because it was press-in style there was no need?

The volume of oil going through that extra hole is probably not too significant but it could bleed off a little pressure in the cooling circuit. What that means, I don't know either but everything you do has another side to it.