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Old 12-11-2009, 09:34 PM
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Exhaust Recommendation

I had Flowmaster exhaust installed in my 1963 Chevy truck and I am finding it is a little too loud for my liking.

The engine is a 383 with 400hp+, if that is pertinent.

Any suggestions out these for an exhaust system which will be "quieter" and will not significantly impact performance?

Thanks

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Old 12-11-2009, 10:07 PM
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I recommend Dynomax turbo mufflers. Nice, deep tone at low rpm with quietness and they sound off nicely at WOT.
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Old 12-12-2009, 12:00 AM
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Did they run a balance tube or X pipe when they installed it? where are the mufflers located? If they are under the cab they will resonate a lot,I had that problem with a '65 C10.A quality insulation will make a major difference too.
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Old 12-12-2009, 01:31 AM
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The interior sound resonance caused by a classic Flowmaster muffler gets old after a while.

Change to a "tri flow" style turbo muffler design . 2.5" pipes. Full tail pipes exiting at the rear bumper. A crossover pipe/balance pipe that connects the two exhaust banks of a V8 helps too.

Do a google search for Helmholtz filter, helmholtz resonator as it refers to exhaust system sound resonance supression.
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