Muffler

VOETOM said
The Ultraflows flow more because the ID of the perforated section is larger than the inlet and outlet and that let's its gas expand a bit. We got values like 101 to 106% when we ran some.

I’m not sure of the dates of these two charts, or who performed them, when or how they were all tested, but what’s your take on the numbers shown? In line with some of your testing? Now outdated?