FMF never did print a dyno result on that one for anything they made them for as far as I know. At one time offroaders used them for the difference in decibels that the meter would pick up. (You can move sound around a little bit like flow, and depending on where the meter is placed have a better chance of getting the nod through the sound test.)
As long as you can impress journalists with something, you can sell it. The people that read about things like that and never ride with one on a rig are the best testifiers for the product it seems.
But keep the money flowing!!! People need work and this industry has been hurting a lot more than fast food since the economy went slow.