Which o2 housing is the right one?

I see two different types on ebay. There is an O2 sensor plug on the top of the housing and there is another one with the O2 sensor plug at the bottom of the housing before it meets the DP connection.

Which one is the correct one?

 

the one w/ the top O2 sensor bung

 

dont buy from the vendor on ebay: www.ssautochrome.com - they sent me the one with the bung on the bottom. even though they have the correct pic in their auction.

 

There's a big thread posted somewhere on here about them, how they changed suppliers now or something like that, and their quality is not as good as it was. Now they have the 02 bung on the bottom and their welds don't look as good as others in the past.

 

the one with the top o2 bung is correct then thanks!

 

my friend has that in his car right now... just installed it see how it goes.

im getting cams and o2 housing... you guys know how much more of a gain i get with a ported manifold?

 

Wasn't there a vendor here selling the same housing?

 

Buschur and PPI both sell it coated and ready to go.