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Exhaust Tone

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Old Feb 11, 2007 | 03:56 AM
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Exhaust Tone

I just finished installing a new 4" (turbo back) stainless dual Magnaflow exhaust on 2004 F-350. It sounds very throaty for the first 2-4 sec after starting and then sounds like the original factory exhaust. Why does the exhaust sound change after the first few seconds? Thanks for any help or ideas.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" /><o></o>
 
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Old Feb 11, 2007 | 05:11 AM
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Did you kill the cat?
 
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Old Feb 11, 2007 | 06:20 AM
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It's the vanes in the turbocharger changing position when the oil pressure comes up. It's completely normal.
 
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Old Feb 11, 2007 | 03:21 PM
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It don't sound 'normal' once you hit 2k RPM's!!! It sounds MUCH better!
 
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