Are you looking for the GN specific calibration? Or just one that fits.
I have a core here that could be built to GN specs, of better.
Thanks DaveM. I am taking my core to Alliston transmission to have it beefed up and rebuilt. If I could find a GN core, they already have a lot of the good parts.
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Just because you can doesn't necessarily mean you should!
Most GN cores go for more than the extra parts to upgrade a vanilla 200R4 to GN specs cost cost, so I usually just pick up a plain jane 200r4 and upgrade it. I just get the newest one I can, as there were many durability upgrades through the lifespan of the 200R4.
