S50 o2 sensors and relays

[Beau B]

I am trying to button up my S50 swap and was wondering where everyone put their o2 sensors at and how many they used. I used the OBD II headers can I just use the two o2 bungs in the headers? Also what relays did you use with the wiring harness, the relays from the e36, or the e30 relays? Thanks

Beau

[mentaleeill]

e36 relays ad obd1 just uses 1 o2 sensor, i put mine right where the y pipe turns into 1 pipe. thats where it was on factory obd1 m50.