It just so happens that this was the next shirt in the rotation today. Have Fullsac on both my bikes. Don't see any reason for anything else unless you go with a crazy build.
Pix was taken in selfie mode so it's backwards but I think you get the idea.

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Agree!
I just recycled my t-shirt into the rag bin. Wife won’t let me wear my ragged shirts anymore!LOL
When you say “crazy builds” do you mean anything over about 150/150?
Just asking because we’ve seen those numbers on full exhaust, not just mufflers.
I think the OP was wanting to keep things sorta “stock”. With that in mind the cores in 1.75” would do the trick.
Not too loud, but still will reach to 135-140 +/- with a mild build, and stock heads.
I’m keeping my M8 quiet and reliable for the long rides, but still have the power.
