The noise isn't any worse than a regular V-8 with headers and an aggresive exhaust. You can Line-X the tub of your Jeep or use Dynamat for sound deadening. It all depends on the type of exhaust you choose to run. If you want to run 4" staight pipes you can obviously expect some resonation inside and most likey some hearing damage, but it would sound cool. Before I started my swap, I talked to a diesel shop locally about using headers. They said for what I'm using the engine for it wouldn't be worth the expense. They said the manifolds would be fine with minimal or no exhaust crowding preventing good flow. Also, i have gotten my manifolds Jetthott coated. It was reasonable, right around $260.00.