1-3-2-4 Posted September 28, 2012 Share Posted September 28, 2012 On the 97 Outback wagon.. I have my doubts but I don't think any stock Subaru front cat came with two bung openings? Obviously the o2 sensor takes one but it has a spot for another. Link to comment Share on other sites More sharing options...
TOONGA Posted September 28, 2012 Share Posted September 28, 2012 I have seen in factory workshop manual a code for a cat temp sensor, could that be what the other bung is for? TOONGA Link to comment Share on other sites More sharing options...
1-3-2-4 Posted September 28, 2012 Author Share Posted September 28, 2012 No clue Link to comment Share on other sites More sharing options...
Gloyale Posted September 28, 2012 Share Posted September 28, 2012 96-98 Leagcy and IIRC impreza too have two, o2 bungs in the front CAT. One upstream of the Honeycomb, the other downstream. Link to comment Share on other sites More sharing options...
1-3-2-4 Posted September 28, 2012 Author Share Posted September 28, 2012 Thank you for confirming! Link to comment Share on other sites More sharing options...
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