Thread: Muffler replacement huge horsepower gains!
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Old 04-14-2009, 08:01 PM
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priobe priobe is offline
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Join Date: Mar 2004
Location: miami, FL
Cobra Make, Engine: E-M Cobra Ford FE 427 w/ Webers 48 IDA
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I am currently getting ready to make my mufflers. I dont not want to get the same "flutter sound that everyone is speaking of.

Here is my setup.

My collector is 3.5 and my muffler are 3 in with a 4 inch body. I had a muffler shop expand the 3 inch to 3.5 I.D. I will then cut down the expanded 3.5 ID where the cone shape enters the muffler.

Will I experience this flutter noise?
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