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Originally Posted by porsche986spyder
I've NEVER seen a set of headers WITHOUT the bung holes on them. I think you are mistaken. Now it is rare to see the 1st set of cats intergrated into the headers, that part is true. I've seen it on 2 diff. brands. But most don't have that feature but STILL have the bung holes for the sensors.
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Spyder, I should have clarified, most header systems come with only one 02 bung per header (like Che's for instance) not the two per side that are featured on this fabspeed unit. One 02 bung per header doesn't do us any good, we need two and probably some kind of cat to reduce the chance of a constant CEL.