My '03 has cats, O2s, EGR...etc still functioning. Passes emissions every time without question. Obviously it's tuned. How does this affect someone like me? Or does it not because I've "followed the rules" by not removing/disabling/tampering with emissions nannies?
Mostly this stuff affects you when you need a new tune or your device dies. Neither of those will be available if things keep going the way they are.