Best place to put wideband sensor

[timboku]

Wheres the best place to put.the sensor. I have sd headers and no cat. Can I use the rear o2 sensor hole is that to far away from the headers?

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[dsmuts]

That's what I use but I hear it should be closer

 

[GTPpower]

Typically the best place to put it is in the exhaust.

 

[Sven the Sexman]

I believe it is supposed to be within 18" after the header collector. I put mine in close proximity to my O2 sensor...not too close that it'd screw up readings, but close as in "hey, this car has two pre-cat O2's!" to the inexperienced tech.