Hemi, you know, we never got a chance to test them but they will end up similar to the Dynomax Super Turbo offset in center out with a tad less airflow. The reason I say this is they are a reverse flow muffler (I believe) and they will act similarly to other three pass reverse flow mufflers except they have larger internal pass tubes that will drop the back pressure, lower the sound frequency and raise the sound level slightly. Without the patented "Flow Directors" however, they will lose a bit of air flow through them.

Accurate is a fine bunch of folks and I bet they have some actual numbers to share, you might email them and ask and please share if you find out.
Tom Hand