years ago when everyone was getting rid of there Cats. there used to be a trick to fool the 02 sensor in the computer. I thought there were some actual 02 elim's. out there. also wasn't there a trick involving the Spark Plug Non foulers? All you original owners/wrenches hopefully will be able to help!!!Thanx in advance!!! Ohby the way!!….300A 141K Cops replaced at 110k.