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Old Sun, Mar-01-2009, 03:02:49 AM   #3
ohnoes
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Pre-cat O2s, especially for cars that have headers, are a bit of a b*tch. Much easier with a lift.

As for the rear O2s, yes, it matters, but only from a monitoring standpoint; i.e., it will say "bank 2 catalytic efficiency poor" or whatever when it's really bank 1, because you have the sensors reversed. However, as mentioned above, I don't think it's possible/easy to swap them, since the wire lengths differ.
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