My TNT box does not have a bung but I can certainly add one.
I'll probably do some playing around with adding water at various points, but I was hoping to just start off with a quiet box if such a thing exists.
For a laydown pipe you basically have three boxes that most people are running: TNT, RRP, PFP and then a few extras like Xscream and Jetmaniac and who knows what else.
I have a PFP box on hand that I can try, but was hoping there was somebody out there that was familiar with a few of them and could comment if there is anything that stands out as noticeably quieter. I know most people don't really care, but it's something that might get noticed if you have two side by side.
In my hazy memory I actually recall the pfp box being quieter (on a different motor, with a different pipe, for what that's worth), but usually bigger is quieter so I dunno. the smaller box sure is convieneint for fit purposes, so there is that.