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Stock Duramax Muffler Size

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Old 01-05-2011, 07:08 PM
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Stock Dmax muffler is 3.5.

Want mine? it was taken off at 500 miles.
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Old 01-05-2011, 07:13 PM
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I have a gauge for that
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How much would you want for it? I just missed one off ebay for $50 shipped.

How big are stock powerstroke or cummins mufflers?
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Old 01-05-2011, 07:25 PM
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Stock Cummins is 4" 03+.
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Old 01-05-2011, 07:46 PM
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stick the duramax on there and put a 4" cutout if need be.... DMH cutout that is....
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Old 01-05-2011, 11:45 PM
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I have a gauge for that
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Already have a cutout off the downpipe, like I said, im just looking for the quietest 4" muffler out there, dont really care what it is or from.
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Old 01-05-2011, 11:57 PM
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If the cummins are 4" then get on craigslists you should find you one there for dirt cheap.
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Old 01-06-2011, 01:23 AM
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Originally Posted by ap2002
if the cummins are 4" then get on craigslists you should find you one there for dirt cheap.
yep ..
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Old 01-10-2011, 06:00 PM
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dmaxs are 3.5 the whole way out
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Old 01-10-2011, 06:30 PM
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I wouldn't see it as a restriction considering the Dmax is a 402+ CI motor, gonna have to give up some performance for silence.
Last edited by 262_NBS; 01-10-2011 at 06:37 PM.
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Old 01-13-2011, 03:06 AM
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Hell if you were closer to me you could have the one i took off, and they are really quiet
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