I was wondering if anyone knows the thickness of the starter spacer offered for the 13" Clutch upgrade?

 

I didn't use a spacer for mine. Im using the SB con-fe 13" clutch and it didn't require one.

 

I got a spacer-plate from a local cummins freak.
He purchased it @ Cummins directly, $60.00.

So note;
When converting to a NV4500, or even NV5600 if you use the 13" clutch you will need a spacer-plate unless you buy LuKs upgraded flywheel. It comes w/ the spacer plate.