I bought anOBX high flow cat for my 98 sedan, it did not have the hole for the 02 sensor. I want to get an 02 simulator to get rid of my CEL and was wondering if i could just plug the sensor in without screwing it into the cat since there is no hole to put it in. Would it work either way or would i have to get a hole put into the cat in order for the simulator to work? Also, are thereany other easy ways to get rid of the CEL that you guys know of? Thanks for the help.