Check out thread modify 2013 stock muffler. There is step by step instructions. Pretty simple to do I did my 2011 850xp and getting ready to do my 2013 850xp. Slightly louder at idle and still mellow at wot.
This is how i did my stock exhaust mod. Took off both end caps.. drilled the holes in the baffle and capped off the stock outlets. Had some 1 3/4" pipe bent to 45 degrees and welded it all together. Sounds GREAT!!
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