Yes.

Define better. He will extract a few more HPs and torque, but the car will drive just fine without a tune.

But to get tuning software and get a tune is not cheap. For a car with just exhaust mods, he will pay a pretty penny on top of the already expensive full exhaust system, to squeeze out minimal power gains.

If he sees value in it, so be it. That’s something he will have to decide.

um... wut?

so a free flowing exhaust makes the car run rough? That’s honestly the first time I’ve ever heard that.

Why do I get the feeling we are talking about two different things here. A full exhaust system, in order to get the most out of it, should have a tune placed on it. But it’s not required. You’ll still get gains without a tune.

As for anything else related, yeah, a tune can do that.

Either way, a tune doesn’t optimize your fuel. Your fuel is your fuel. I think you’re trying to say something else, but I’m not really sure what

OP was simply asking if he needs a tune for a full exhaust. He does not. But if he wants to maximize his gains, a tune would do that. He will still see power gains without a tune, but not as much. We weren’t talking about anything else in here. The stock tune is fine. It’s made for reliability beyond anything. Can it be improved? Sure. Everything on a car can be improved if you’re willing to dish the cash for it. Is it necessary? On an otherwise stock car with a full Exhaust? No, not at all.

It was easier to say full exhaust than naming each piece everytime. Either way, it makes no difference in this discussion.

Slap it on and call it a day