Silver_Rex

I Tried searching for an answer but no luck.. So im asking it now..

I was looking at my friends DC header for his CRX and I noticed that the 02 sensor was not in the same location as my 5 year old dc header.

Does anyone know why the new headers have the o2 sensor now located at the very end of the header?

Mig

jc836

It is due to emissions and the fact that the header is CARB approved. The sensor must see the combined output of all 4 cylinders. Our race car has the 4-2-1 DC header and the bung is indeed at the end of the collector and works just fine. You will need and extension cable from the stock location-make sure it is high temp wire and keep it as far away from the pipe as you can. Better yet-get it from DC Sports.

Silver_Rex

Well thats was odd JC, my header is a carb approved ceramic header from DC.
But like i said before my O2 bung is located on the #1 tube and not at the end of the collector like my friends new dc header.

Mig

Silver_Rex

Anybody?!?!?

crxtreme89h

I take it you guys have D series motors?

My DC Sports header for my B16 has it at the collector. That is just Ghey, considering the stock locations on the B16 Factory header.

Tyson

i think its because CARB approval later required that it be placed on the collector and not just one primary. when i had my car recently smogged in california with a dc header, the guy mentioned he wouldnt have passed it, but dont take that as authority.