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Discussion Starter · #1 ·
Does anyone happen to know the bolt size of an O2 sensor.

I installed a catback on my buddys rex today with a high flow cat and it has a O2 sensor hole on the high flow but its uneeded and aparently didnt come with a plug.

So i need to find the right size bolt to put in there to seal it off.
 

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i had a similar problem a few years ago. I had a gsr downpipe on a obd-0 b16. I didnt need the o2 bung in the downpipe so I ended up taking it to an exhaust shop after I couldnt find anything to fit it. They put in a plug that was a little too loose and just welded it shut. Cost me $20. Or just put an old 02 sensor in it :lol:
 
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