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FMF factory 4.1

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Anybody know how to make a factory 4.1 quieter. I have to be at 96 dbs. I'm at 99.6. New colorado law 96dbs as of july 1 2010,all off highway vehicles.Or pay a 275.00 fine if cought.

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The latest 4.1's come with a 99db and a 94db insert. I'm sure you could order the 94db insert from FMF or find one on ebay.

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