o2 sensor ?

[lee112]

hey i got a 2003 oz rally im bout to put on performance headers and the high flow cat aka test pipe from rrm and a cat back exhaust somebody told me to just leave the o2s off and buy the plugs for them or just change them and have the cel on all the time has anybody had this done or what not im trying to see what my options are

[JRR]

well if you dont have o2 sensors then your computer doesnt know "what" to do. you computer takes the reading from the 2 o2 sensors and makes an estimated guess on what to do with the given information.