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Old Jul 16, 2016 | 12:07 PM
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Default exhaust noise

On my 2000 when the exhaust(corsa) gets hot at idle at a stop light I get this almost inboard boat motor sound occasionally. Does anyone know what this could be? This is my first C-5. Thanks for your help.
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Old Jul 17, 2016 | 03:07 PM
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Any other thoughts?
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Old Jul 17, 2016 | 04:10 PM
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Originally Posted by redvetteman81
Any other thoughts?
Yes.
1. What 8VETTE7 said
2. I find it sounds more like an outboard motor
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Old Jul 17, 2016 | 04:24 PM
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Is there a possibility that it just might need tightening? It sounds like there is a little rattling noise when you rev up the motor. Thanks guys.

Last edited by redvetteman81; Jul 17, 2016 at 04:25 PM.
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Old Jul 17, 2016 | 04:48 PM
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You could have baffles that are blown/torn up inside the actual mufflers
themselves.. Just a thought
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Old Jul 17, 2016 | 05:53 PM
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Originally Posted by 8VETTE7
Normal sound of the C5 exhaust on decel with the factory H-pipe. Can even be heard to a lesser degree with the factory mufflers. After market Cat back systems seem to make the sound more audible.

Installing an X-pipe in place of the H-pipe will significantly reduce the motor boat sound but not completely eliminate it.
I agree, I have an 2002 with the same issue.
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Old Jul 17, 2016 | 05:57 PM
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Originally Posted by redvetteman81
On my 2000 when the exhaust(corsa) gets hot at idle at a stop light I get this almost inboard boat motor sound occasionally. Does anyone know what this could be? This is my first C-5. Thanks for your help.
My 2002 does the same thing when it gets Hot and at idle. Nothing to worry about, just the way it is. I heard noise with stock exhaust, put Borla Atak on, still hear noise.
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