When I did the install I did a short drive with stock midpipe and no axleback, stock midpipe and nameless axleback, nameless midpipe and no muffler and nameless midpipe and nameless axleback.
Stock midpipe with no muffler was a bit boomy, but not too loud. Nameless midpipe with no muffler was stupid loud. I felt like everyone was staring at me.
When i put the nameless on the stock midpipe, I did feel like it quieted it down a bit, however, it was also a more refined sound.
I would say give it a few heat cycles to break in as well. I thought it was really loud at first too. Now, I both wish and don't wish it was louder. Depends on the occasion.