I am planning to buy a Gibson exhaust system for my 2003 Xterra. Just wondering what's the best mod combination to go with it. Also, I want to know if it's worth putting money into it. Any opinions???

I have a borla exhaust and I love it. I put the K&N intake system after and noticed more. That would be my suggestion, your talking about moving air better. Your doing the exhaust, intake should be the next. After that, I would do a cpu adjustment. They set your computer to your new mods and treak it in general do give you more hp. You can get it done through reagan performance.