Arctic Cat 400 Open Header & Muffler Mods

In this video, I take the muffler off my Arctic Cat 400 to hear it straight pipe and it is super loud. Another reason I took the muffler off was to drill some holes in the baffles to make it flow a little bit better because the engine did feel a bit lame but now it feels and sounds a little bit better. Also, performance muffler is like $300 so that's why I am modifying the factory one.
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Thanks for watching!