New O2 sensor installed

[Guth_imp]

Did you replace the header gaskets when you dropped the headers for this install?

I would have, but I got a a fair amount into the job only to realize that I had totally forgotten to order the replacement gaskets.

In the end, I did not end up removing the headers. I loosened up the flanges to the point where I could move the exhaust just enough to allow my socket to fit between the frame and the collector. Out with the old and in with the new. Everything went back together without issue. No exhaust leaks — at least for now.