will i need an o2 plug in the cat for 94-95 gsr?

 

First, there's no O2 bung in the cat on a 94-95 GSR. Second, if you put an OBD-2 GSR cat onto a 94-95 GSR, then you can just cap it off with a bolt since an OBD-1 ECU doesn't look for a 2nd O2 sensor.

 

94-95 GSRs have one 02 sensor...its in the cat.

If you use a 96-99 cat with 2 bungs, all you have to do is take a bolt and plug one bung, screw your 02 in the other.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Newman &raquo;</TD></TR><TR><TD CLASS="quote">First, there's no O2 bung in the cat on a 94-95 GSR. Second, if you put an OBD-2 GSR cat onto a 94-95 GSR, then you can just cap it off with a bolt since an OBD-1 ECU doesn't look for a 2nd O2 sensor.</TD></TR></TABLE>
the only o2 is on the cat on my 95 gsr. the header has none

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by oMekoneDC2 &raquo;</TD></TR><TR><TD CLASS="quote">
the only o2 is on the cat on my 95 gsr. the header has none</TD></TR></TABLE>

Heh... mine does (on the downpipe... not on the cat )

 

Hmm...

well at least for USDM GSR's, ALL 94-95's have one 02 sensor, on the cat. None on the header.

 

the carsound cat i have has no o2 bung but my dc header has one. can i just stick the o2 sensor in the header instead of the cat?

 

yes because the stock O2 sensor is BEFORE the filter in the cat....so anywhere from the head to the cat's "filter" is fair game....but too close to the head might cause too much heat, but shouldnt matter those things are tough.

 

Yep, you can just pop it in the header then.