[QUOTE=SRQ Boxster]
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My rear O2 sensors were simply unplugged from the main harness. The ECU reflash that was performed on mine only requires the use of the two front sensors that are installed in the new headers. I think you will be more than satisfied with them. When I purchased mine, I was not expecting anything more really than a $100.00 set of headers but am pleasantly surprised whith the quality, fitment and performance gains so far (less than 200 miles on them).
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I'm confused, you say the rear O2 sensors were ungluged, and the 2 front ones were used. But the way I see it the 2 front sensors are part of the 2 that are being used with the new headers. And it only has one hole for one sensor. As I was told the new headers do not come with one whole on each side. Correct? The other 2 REAR sensors are in the DOWN PIPE before the exhaust. So which is really the front and which is the rear. I think I understand you but what you are calling the rear are actually the front 2.
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