Hey, I put some headers on my 91 ef, d15b1, and I connected the o2 sensor to the header part, but the 2-1 part has a hole for a 02 2, but I cant find any other sensor to plug in 2 that.... does my car only have one?

 

Our car in it's correct OBD form only uses 1 O2 sensor. What you probably have is a generic header designed to fit a variety of D-Series engines.

 

i think they sell plugs for those

 

Just leave the hole open. Sounds way better

 

it will make your b1 have vtech

 

yeah its just a shitty ebay header. thanks for the knowledge, I guess ill just plug it?

 

yes