2014 6.7 with second gen swap (not vgt). SUPER loud direct channel when I bought it. It was decent at first but the drone quickly became outdated and I'm sure my neighbors didn't like it. It didn't drown out the truck in any way, it's certainly still loud with a nice growl. However, this calmed him down considerably. Almost no rumble, much nicer on the road, much quieter when starting and idling. I can talk behind a truck and not yell anymore. And yet it sounds EVIL when I feed her beans. Exactly what I was looking for. I would even go so far as to say that it has cleared up the tone, so regardless of the volume, the actual sound quality of the exhaust is better too.