After using my ole search button I am finding some differences on where people placed their O2 sensors for their Wideband kits. I know that 240M3SRT6 put his on the header before the first set of cats but I also see Waldig put his on the exhaust downpipe after the cat. The wideband kit says to put it before the cats, but of course it also says at least 18” downstream from the header and that is impossible on our cars! Also, we have two sets of cats so that makes me have even more???? Any input would be most appreciated!!! I am using the brand new Prosport AFR gauges with the heated Bosch O2 sensor. Where should I weld this "bung"???

 

I put mine on the passenger side exhaust right after the first cat. I believe this is ok for general readings, but the way 240 did his is probably more accurate.....

 

I put mine on the drivers side between the two cats,, then checked it with the dyno reading,, both read the same so i guess it is ok where i put it, also amjerry did my tune and set the af at 11.7 to 12.1 and my readingin the car is 11.7 at wot. with SC pully, 16lbs of boost so i could run a few more lbs of boost without adding fuel. jim

 

pass side (as its last to get fuel) just after the primary cat

 

Thanks for the input guys! Most helpful!!!

 

Here is the photo,FYI, Wideband readings matches the factory sensor reading from the cars O2 sensor.
ENJOY< WOODY< Happy holidays and merry christmas...

 

Sorry to bring this thread back from the grave, but may as well put it here for future searches.

Where is the best place to have install a wideband o2 sensor? Do you pretty much need to go to a speed shop, or will a muffler shop work alright (or would they even try)?

 

I would think any muffler shop would do just fine