whats next?
Like I said earlier if you have to pass vehicle inspections you'll need emissions.If not you can delete them.You usually don't need a tune for headers but it would help.By deleting the cats and the rear o2's you will throw a trouble code but it won't effect the cars performance at all.Or you could keep the emissions and use o2 sims and you shouldn't set any codes.My opinion, the emissions system is unneeded clutter.I deleted mine and the cats,I do have the trouble codes but it runs just fine.

