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Old 03-02-2009, 05:22 AM   #5
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Join Date: Aug 2007
Location: CA
Posts: 115
I installed a Dansk "sausage" muffler and had some drone at about 2.8K RPM, but after I later installed headers (retaining the second set of stock cats), the drone disappeared. I guess there must be something about the difference in resonance between the muffler and headers that canceled each other out. Not really sure, and don't really care - all I know is that I don't have the problem now.
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