No such thing as a dumb question. Dumb is asking why, after you do something.
What are you looking for, performance or noise?
Better exhaust flow is a good thing. Umm a header and cat back isn't going to do a lot if the cat you have is a smaller diameter pipe.
If it's just noise you want, yep the right cat back system alone will change that one.
97 Sahara, 74 Renegade, 72 CJ5, 55 Willy's (the Beast) Boss 302, 6:34 gearing, Bose 901 speakers.
God I miss that Jeep. Forgot the kinda Jeep, 80 SX4.