Thread: Muffler shop told me "impossible" to put a Flowmaster-type muffler on a 911!?
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mlangbauer mlangbauer is offline
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Join Date: Jun 2007
Location: Denver, CO
Posts: 30
This is a great post. Any ideas on the hp increase with using a cat bypass and a Flowmaster or Dynomax muffler?

Best,
Matt
Old 04-13-2010, 07:14 AM
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