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rear o2 means the secondary o2 sensor, not primary, so he's right in that it doesn't do much. iirc all it does is measure efficiency
and for your answer
kfl = alex?
i have a '95 manual base
the rear o2 i have is from sparkplugs.com and was a 'manual' o2 (which is no longer available btw)
the piping is from arthur's car, which was an auto 96 iirc.
yes it screws in.
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