My 2nd o2 is out, the one on top of the exhaust before the cat.. whats the best and cheapst one to replace it with. And if i decide to get an aftermarket exhaust... Will i even need it or will the check engine light just always say on??

Look forward to meetn everyone Sunday at WTD hope it doesnt rain all day

 

just go with oem one. and no with aftermarket exhaust that will not stay on. and you do mean the O2 sensor on the Header correct?

 

i dont think so