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Best Flowing HP muffler

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Old 04-30-2008, 07:35 PM
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Default Best Flowing HP muffler

Lots of muffler companys out there, whats the BEST 4" in/out muffler for a bigger CI motor?
Old 04-30-2008, 09:08 PM
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Prob magnaflow or a bullet type moroso
Old 04-30-2008, 09:15 PM
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Disregard those choices ^...Go with a Borla XR-1
Old 04-30-2008, 09:58 PM
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Magnaflow or Borla X1R. Forget anything else.




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