How can you tell the difference between the obd1 oem header and the obd2 oem header for the b16?? I have a B16a2 and im looking for the right header so i can pass an exam by smog ref. Anybody?? Pics would definitely help.

 

I don't think theres a difference in the header, its the catalytic converter that makes the difference. Theres an O2 sensor on the header and one after the catalytic converter on OBD II vehicles.