guys, every car 96 and on is OBD-II and all 96+ integra have two O2 sensors in the exhaust, one upstream of the cat and one down. Some have have the upstream on the header and some have it on cat. It is not a difference between different years, but i believe between CA and non-CA models, call any company that manufactures cats for integras and that is what they will tell you.

 

I run an OBD1 header on my OBD2 integra, it has the bung in the header...Carb exempt for California.

 

obd2 has two oxygen sensors? i have three for some reason, i dont know if my car has been messed with or not but i do know that my car is a theft recovery with a *clean* title. it was found with everything stock except it had no wheels. and the cast iron exh manifold has one o2 sensor and the stock cat has two. h: ill take a peek down under soon to see where the o2 wires lead to, thanks lots for all of the replies.

 

well, if wosre comes to worse and you can't return it I welded a bung onto my DC header, and painted it. I got some high temp flat aluminum colored paint, a little light sanding (400Gt) and a wipe with alcohol. Only one flakey spot in 2 yrs.

 

alright, so to clarify...I have a 96 GSR, it was not sold in CA. So I should have no O2 plugged into the header anywhere? jsut the cat? I'm getting a stainless greddy header to replace my buzzing A-pipe. Otherwise, my car is completely stock. I'm just curious...by getting an aftermarket header rather than a factory a-pipe, do you think I'm running the risk of having any problems such as burning out O2 sensors or any other related problems? that might not make sense, but I don't know much about it. I'm just a little nervous about bolting on this header and having some problems pop up as a result...I guess because the rest of my exhaust will be stock and I'm worried that the higher flowing cat won't jive with the rest of the exhaust and start giving me CEL's all the damn time, messing up the air fuel mixture, etc.