I put the 2nd O2 sensor (the one after the cat on 96 and newer vehicles)
into the 3" end of a reducer/adapter going from my 3" cat-back system
to the stock 2-1/2" pipe at the cat outlet. Never had a problem (8
months now).
Rich
'96 V8 CC 4X4
MP cat-back; K&N drop-in
>
>
>I also heard that putting the O2 sensor in a 3" pipe (vs. the stock pipe)
>can have adverse effects as the air would be cooler and the velocity would
>be less.
>
>As it stands I wasn't going to open the pipe leaving the cat until AFTER
>the O2 sensor. That's about 6" after the cat.
>
>Opinions??
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