Random O2 housing

[JAW91]

I just got my car running again after a 2 year down time and I was going through my old parts box, when I noticed I had 3 O2 housings in there. Two of which I know are stock, but I was wondering if anyone knew anything about the third? The one in question is the top one in both pictures.

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[JAW91]

Guess the pictures didn’t work for whatever reason through the URL, but I reposted them through this site.

 

[DSMPT]

From the top, 1g, 2g, 2g.

 

[AWD-Tony]

1g has the o2 closer to the turbo and 2g is closer to the downpipe on the O2 housing.

 

[JAW91]

Thanks guys.