Assuming cai. After long tunes, it's highly recommended to get a tune to maximize the gains and fix the check engine lights that will be on.
Cal speed or Lpp headers for low budget, pacesetters aren't much more for some of their long tubes.
Tunes you can go with black bear, Nelson, Wheatley, mj engineering, or find someone local who is reputable. All the ones I listed, to the best of my knowledge, offer remote tuning via autocal.
Before making any big decisions, read up on different brands and build threads, listen to exhaust videos to get an idea, then pull the trigger on your parts. Better to do it right the first time around vs wasting money changing your setup multiple times because you didn't research enough.
