Oxygen Sensor

[needpower]

i own a civic SiR. from where i come from, it is a 4-door sedan with a b16a engine. when i installed headers on my engine, we found out that there is no oxygen sensor. if i install one, will this improve engine performance? what materials do i need and where will i connect it?

[drift]

there's an O2 sensor. you just havent found it. it's possibly installed back by the catalytic converter.

unless of course there was one installed, but someone cut it off.