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Does anyone have an image or a link to what the interior of the stock mufflers look like? Even if it is not specifically CB350 mufflers... anything illustrating the general construction would be good. I understand from various threads that stock mufflers for these bikes use several chambers to achieve a much greater functional length that the exhaust gasses have to travel. While the exhaust may be ~30 inches, the chambers mean there is 2-3 times that length that the gasses travel, which makes for a better scavenging effect, smoother idle, and more low-end power.

I'm trying to learn how what's inside them so I understand how they differ from aftermarket, mostly straight-through mufflers.
 
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