I searched and read quite a few performance threads and it seems like the overall opinion is that chipping/programming, exhaust and intake are not worth the $ put in when it comes to power put out.
My question is that - My JK has 144k miles on it and the other day I got a check engine light that equated to a cat restriction code.
I want to remove the cats (I believe there is two) and straight pipe that part out. Is it worth also replacing the muffler or is the gain marginal? I would anticipate some power being given back from the cat but do not know if I should do the muffler as well.