Never mind I found it...

https://honda-tech.com/zerothread?id=1885652
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This is for oem y8 header
I was taking it out and the primary o2 sensor hole is slightly stripped.
The stripped portion is mainly at the start of it, so i know if I could just rethread/tap the end of it, I would be able to screw in the o2 sensor.

what size tap to use for o2 sensor?



Modified by Charlie Moua at 8:28 AM 11/10/2008