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Cat Converter Bung

xDread92x

Member
Joined
Feb 5, 2015
Location
NC
Hey All,

So I am checking out Cats online and it looks like the hole for the O2 sensor appears to be various sizes from product pictures. The O2 hole on the Volvo brand seems smaller than the one on the Borla brand for example. Is this just picture skew or do various sizes exist?

How hard is it to make a bung on a cat?

Also if anyone has a good cat for a good price that is compatible, just let me know. 1992 Volvo 245.
 
Does the O2 sensor thread in? In the pics for these cats online I don't even see threads. It looks smooth honestly.

I've never dealt with them personally
 
Last edited:
The question is 'are all O2 sensor threads the same?'. Yes they are.

Yes, the O2 sensors screw into a threaded bung.
 
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