Does the OE have a flush centered fit over the splines? If so it shouldn't be a problem. I use the one that came with my ACT and it's fine. The mustang guys have issues like your talking about and they use OE.

 

As far as I can tell, yes - the bearing sits exactly the same as it would on the OEM plate.

 

Shouldn't be an issue. A slightly smaller TOB isn't necessarily a bad thing... The recommended one for my OS Giken twin plate is smaller than the OEM one IIRC.

Chances are, if properly fitted/installed, it will last the life of your clutch.

 

^That ones thinner so your pedal doesn't grab at the top or doesn't disengage the clutch due to the stack height of being a twin disc.

 

Correct- But it is also smaller in diameter... Almost positive of it... The clutch sleeve is shorter too to foster solid engage/disengage. I was hoping you would chime in on this one... You are kind of like a walking FSM

 

Personally, I would use the TO that came with the kit. It's designed to allow correct pedal engagement for the designated clutch.

On the OS Giken, or any twin/triple plate clutch used on a Nissan, it's better to go with the thinner bearing because it keeps the clutch pedal feeling near stock. If you use the thicker bearing on the multi-plates, it will make the pedal pretty stiff.