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Header pipes 09 YZ450

5 posts in this topic

Going out on a limb here in saying that I seriously doubt anything will work with an unmodified stock '08-'09 muffler.

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Just trying to keep that shorty look.:ride: I know if I get into the inside and do some customizing it's going to be way to loud.:ride:

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Forget about the header, you got to get rid of that muffler. I got rid of that whole system 5 minutes after I unloaded it from the dealer.

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