I feel pretty embarassed asking this, but I was wondering if anyone knows if it's safe to drill a hole in my DC Sports headers to place an O2 sensor.... because the header did not come with a bung to place it in. Anybody know if this is a safe thing to do? Thanks.

 

that doesnt sound like a good idea.

 

What header did you get? Sounds like you're trying to jerry rig something... did you not get the right header for your car?

 

I bought a DC Sports 4-2-1 header for it, but it only came with one O2 Sensor down at the bottom, near the cat.. but I still have another sensor on top of the exhaust manifold... yeah, I know it sounds pretty ghetto.. I was just wondering..

 

What engine/car is this for?

 

sounds like a civic dx am i right?

 

there is only one 02 sensor in the header, and one in the cat if youre obd2. the header should have come with an extension harness so u could use the stock o2 sensor in the new location

 

Yeah, this post confuses me without knowing what car we're talking about. I don't know of a header that has 2 O2 sensors in it... but I don't know it all either. h:

 

the dx has two o2 sensors in it post 96 obd2

 

your gonna get a CEL if you run without the cat in the stock manifold - ECM checks for different readings before and after cat.
You might want to look for P28 ECM, convert the harness over and get a header for a 92-95 which locates O2 in front - OBD2 sucks! I wonder if anyone else has fixed this problem with their DX and kept their OBD2 setup to not run into emmisions - smog check issues??