my emissions and inspection are due soon and i need some help. my cats are gone, i'm not sure about o2 sensors, and i need a new exhaust cause right now its a slp. i'm savin for an exhaust, but i need to pass emissions first. if i tune the rear o2 codes, and buy the universal cats, as long as i dont have a blown front o2 sensor it should pass emissions right? and should i gut the present cats so it passes inspection for when its needed?