Is anyone able to give me some help understanding tuning for a Subaru? I have an 05 Legacy with an Ej20x, I need to remove my cats because they are clogged and the car is throwing some codes for it. Im thinking ill either cut them and just weld pipe in or ill buy a catless downpipe. Should I be tuning it? If yes, what should I do to get it tuned? Im not looking for power, its my daily driver. The exhaust just isnt flowing properly. Do I take it to someone, and does it need to be dyno'ed then? Or is their a good way to get it etuned.