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I've been running mine with both cat's gutted for a few months now. I put a spark plug extender on the O2 sensor to get it out of the exhaust stream and it seems to work fine with no CEL. BTW it sounds better and it might have a little more pep to it, it is a manual though so it's easier to notice the little things.


That is interesting. Is the O2 sensor exposed to fresh air also?

1998 Sportage - Gone.
2004 Honda Civic Coupe.
2007 Suzuki Grand Vitara - She got it.