I need to replace my stock cat with a high-flow one that has a bung for my 02 sensor. I have OBX 4-1 headers and OBX cat-back exhaust. My car won't pass inspection because of the CEL (NJ) and I'm overdue by 2 months. I think someone posted something about getting one from Summit racing but I'm not sure which one it was. Also, does this cat need to be welded on or is it a bolt on?
You don't really have to have a cat with a 02 sensor hole in it... Buy a cat... when its being installed have the shop weld an 02 bung right after the cat, install the sensor, lengthen the wires if you need to, and you should be good.
That's what I had done on my car:
(before the bung was welded on)
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