hey guys, as u kno, i am having cat problems, and i realized that the mechanic who changed my O2 sensor, changed the one on the header.. im an idiot, for not checking this earlier, this mechanic, wont reimburse me, cuz he said thats what the job was for, when i clearly remember it was for the cat... anyway, not the point, so im not ready to spend another $250(including labor) for an O2 sensor, cuz i am OBII(98 accord 2dr)... my friend got a universal o2 sensor for his RX-7 and it works fine.. he said he only paid like 20 bucks, that cant seem right, would my emissions be ok?... i bet thats the o2 sensor mechanics give u anyway, if u dont go to honda... cuz i know its not a honda o2 sensor they gave me. im getting my high flow cat now, and need to change the O2 sensor as well on it. and one more question, someone told me i could just gut out my OEM cat, and take the crap that is clogging it, and just take out the o2 sensor on it, this guy is pretty knowledgeable, having done so many JDM swaps on his car... but i want to ask u guys, it that ok? he said it depends how bad my cat is, however, the check engine light would still be on, but at least my car wont vibrate anymore, and feel like its fallin apart as it is now.. will i fail emissions if i do it this way? being ULEV, im wondering i got such good emissions that i will be ok but maybe, the opposite, my car system is so tuned for low emissions, things will go wack? he said my car right now is like it has a banana in its exhaust right now, or like a person trying toi breath with a plastic bag on their head, my engine is hurting now... what do u guys think?