ok..i have a b16..but i dont have the lower piece of the exhaust manifold (b pipe?) what integra or civic does this come off of? please list all that will work..and will they mate up to my stock crx exhaust?

 

All B series motors exhaust manifolds interchange...Integra, Del Sol (B16), Civic Si (B16)

 

will it mate with the factory exhaust?

 

My header for a b16 (99-00 si) mated just fine. I don't know about the stock SiR one, is the flange in the right position?

 

if i ran a complete usdm exhaust manifold i wouldnt be able to run 2 o2 sensors...does it run ok when you plug 2 wires into 1 sensor?

 

the point of the 2 o2 sensors was to get good readings from the cylinders (I think it pairs 1+4 and 2+3). You would think splicing one sensor that is taking readings from all 4 (like a usdm dc) would be ok. People have said to try and use both sensors. I personally am only running one. Motor runs ok, but a little rich I think (bad gas mileage).

 

It will mate with a little mod...the length is fine but the bolts on the CAT may not line up...but if you have a CAT or a test pipe that has a movable flange, then your problem is solved. With regards to the 1 or 2 O2's, i dont have personal experience to that regards so I do not even want to try and may end up misleading you. I suggest you do a search because this question has been asked a few times before.

 

mine didn't. i tried unbolting the cat and rotating it so it would bolt up. it was still about 2 inches too short..i stretched it and it bolted up. two weeks later i had a custom exhaust built..much better. about the 2 o2s..i was using the stock manifold, and had them hooked up backwards..i got a wierd hesitation at low throttle. once corrected it was fine. my advice...if you only have one o2, get a second bung welded in, and two o2s installed in stock locations.

 

Or get it chipped to only use 1 O2 sensor.