Please don't flame, I'm not good at searching in forums and that's why I ask my question here. I want to get some shims for when I open up my diffs as soon as my new Outcast/Notorious gets here this week. So the question is, what are the spec to look for ? I know it will take maybe 1-2 or 2-2 etc that is ok but I can't find the spec of a shim it need to complete the job.

Thanks

99% of the 2018 and newer cars do not need to have their diffs shimmed. Always dry fit your diffs before adding fluid to make sure they do not bind.
That being said Mugen E0206 are the shims you need
But this is Thomas P's how to