Muffler / Exhaust

[Leon R]

Fascinating! So what makes that valve open/close? The volume of the exhaust gas flow?

And is that the maximum amount that it can open?

Thanks for cutting it up!

[89Vette]

I'm baffled by the valve too. (Get it? baffled? LOL)

It's difficult-to-impossible to determine flow path and what that doo-dad really does. I also wonder if it's really a direct obstacle to the "main flow path"...or something in a "secondary circuit"?