ive been looking in archives and everything and decided to go with the o2 simulator for my 98 ls obd2. but i was look at my downpipe and saw there was no o2 bung in it. am i gonna have to install a bung into it for the first o2 sensor. im not worried bout the 2nd cuz of the simulator, im just gonna get a muffler shop to get a strait pipe thru. plz any help is appreciated