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Why is my exhaust louder for the first few mins, the suddenly getts quieter?
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04-17-2010, 04:41 AM
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MysticBlue
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Quote:
Originally Posted by
swamp2
Richer initially - to heat up the cats quickly so there is less time with the cats inactive.
Leaner is hotter, that's why I would think it would be leaner, not richer. But I'm just guessing.
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