i just got my Dc 4-2-1 2 piece header today off a friend, its got an o2 sensor hookup on the header but not the down pipe, i kno without hooking up the other sensor my ecu will throw a code, but will my car run like shit, b/c right now i dont have the cash to get a bung welded on for the other o2 sensor..suggestions?

 

Yes the car will run like shit, in my opinion I would wait till you can hook it up correctly. What year is your car, because my O2 sensors are on my cat.

 

least you got a DC product

 

yeah don't install without the o2 censor. did you try the header on and it fit? i think i think got the same header (dc-s 4-2-1) but when i install it on my 99 integra ls the o2 censor hit like a moving part.