O2 sensors

[Whidbey Goblin]

On my donor car there were two O2 sensors. One in the exhaust manifold and one in the downpipe. My new header has a port for one 02 sensor but the pipe and muffler DF sent doesn’t have a hole for an O2 sensor. Is this something I need to weld in or do I not use the second O2 sensor?

 

[ATMironov]

On my donor car there were two O2 sensors. One in the exhaust manifold and one in the downpipe. My new header has a port for one 02 sensor but the pipe and muffler DF sent doesn’t have a hole for an O2 sensor. Is this something I need to weld in or do I not use the second O2 sensor?

The 2nd O2 sensor monitors the efficiency of the CAT.
Since there is no CAT, no need for the 2nd O2 sensor.

 

[JBINTX]

only one needed. The one that was before the cat.

 

[95Blitz]

Cough cough Wideband for the 2nd spot...

 

[Whidbey Goblin]

Cough cough Wideband for the 2nd spot...

What is that?

 

[95Blitz]

What is that?

https://www.summitracing.com/parts/avm-30-4110

Used to measure air to fuel ratio.

 

[Desert Sasqwatch]

Wideband air fuel ratio (AFR) sensor that's used for tuning with HP Tuners.