Great questions. The most wicked exhaust I've ever heard in person was a setup with Stainless Works headers and a Corsa catback exhaust. But according to my son who rode I that truck a good bit off road said that as wicked as it was at WOT, it had very little drone. Drone is the amount of low resonance sound while cruising. Cutouts are installed before the muffler (s) to bypass the muffler for a straight piped sound. You can open them when you want to hear the wicked sound and close them when you want or need to be more tame.
If you install only a catback, even with cutouts, you should not need tuning. But if you install headers you will need custom tuning to dial it in. Especially if you have to pass emissions in your state.
We are currently offering a sale on our exhaust systems. If you would like a no obligation quote, send me a private message here on the forum and I will be happy to help you nail down your upgrades whilr saving some money at the same time.
