Pro Circuit quiet inserts

I bought a 2007 WR450F with a Pro Circuit Ti-4 muffler. It's too loud. I Googled quiet inserts and there are a dizzying bunch available with not much info.


Does anybody know which particular quiet insert fits my muffler and whether it will actually help silence the noise?


Called up PC and found out they quietest thing they have is part number PC-2100-09-4.0, known as the stainless quiet insert, which includes a spark arrestor. Supposedly 96 db.

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