So...if I wanted to be significantly quieter than my current half-way glass-pack installation, what would be good? I like being able to hear myself think, so I'm not sure a 6.2 is capable of being too quiet. We already know your truck doesn't play nice with the drive-through.
Of course, in the other truck with no insulation and old exhaust, I can't even hear my passenger shout. So the bar isn't set very high just yet.
Exactly. I bet you would be in better shape with this setup over what you have now.
The off-balance lope is kinda fun to listen to, but this is not an engine that needs noise amplification. The diamond eye muffler seemed small enough that I wondered if it was a straight-through muffler. 
Do it. The turbine alone still lets the harsh pop of the opening exhaust valve through. Anything straight through and free flowing is good. I like MBRPs 18” resonator, and their 30” sounds good, too.
I took your initial question to be just a general, “should I use a muffler?” I think so, but which one depends on your end goal.
Yeah I know. My camera was having an Ethan episode and wouldn't take the picture. We try again today with daylight.
I’m 85-92 depending on throttle position and RPM, but I still have to lay dynamat in the rear. It’s loud, but a lot of that is tires, too. I have my louvers pointing rearward for flow and performance, which is more important to me. Point them forward for better sound suppression.
