Mine should be here for beta testing this weekend. Trust me, if you drive a 6.2 with Corsa exhaust and CAN'T tell when the DFM kicks in you would have to be deaf or not paying any attention whatsoever. Its incredibly obvious. Before the exhaust, I could tell mainly cuz I'm OCD about that stuff, but it wasn't all that obvious to someone who either wasn't listening for it or paying close attention. Even before the Corsa exhaust broke in good it wasn't that terrible, and to be honest I wasn't real thrilled with the exhaust cuz it wasn't all that much louder or meaner than stock. But after a few months that exhaust got good and broke in and significantly louder and sounds amazing. You just hear and feel the stupid DFM. I have a problem more so with the principle of being forced to use DFM if you want to own the best looking truck on the road. Let it be an option, which you push a button to turn ON, not off. Kinda how the auto stop start SHOULD be. If I want to save gas (which is probably debatable anyway) then great, let me push a button to do so. But if I didn't buy a damn 6.2 truck for gas mileage (hello 99% of us out there) then let me run all 8 all the time if I want. Just another way our government wants to control our lives.
Damn, I fell off my soapbox! Guess I'll stop now.