I have a b18b1 header on my b18a1 swap since it connects directly to my existing exhaust. im still obd0. I lost my old o2 sensor and was wondering if the o2 from the EF/DA would fit the thread of the o2 bung of the b18b1 header. There A LOT cheaper than the actual b18b1 o2 sensor. Any help is appreciated thanks.

 

This is what im using in my B16A. Works great and the price is right! Shows it as fitting MANY Honda/Acura vehicles, as well as tons of others. Im running OBD-0 as well. This is a single wire sensor, with the round plug.

 

So you also have a b18b1 header?

 

Where's the O2 bung located on the b18b header?

 

Can't remember off the top of my head but I'm pretty sure the thread pitch is the same for all civic and integra. As to why the o2 sensor for the b18b1 is More then the one for obd0 b18a1 is it is a 4 wire o2 sensor. And the b18a is a one wire o2 sensor