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The stock muffler's spark arrester is not an obvious screen, but vanes that appear to spin the exhaust gasses. Some owners have taken long 1/2 inch drill bits down the pea shooter exhaust to open it up, and potentially ruined the spark arrester.
Good to know! Thanks for that info, I did not want to drill the arrester and don't plan to. Sounds good this way and still legal then as well.