I just got my aem wideband and had the 02 bung welded in my downpipe right behind my oem 02 sensor. The welds are questionable to say the least but thats not my main concern. When you screw in the sensor, only a very small portion of the tip is actually in the exhaust. When I screw it in the original 02 bung and the entire end of the sensor is actually inside the downpipe. Do you think it will effect the afr readings because the entire end is not in the pipe? Should i just put my wideband 02 sensor in the stock bung and the oem sensor in the new one or just take it back and have them weld it where the sensor is fully inside the downpipe? Thanks a lot.

 

If i was you .. and your gonna keep it that way... switch the OEM with the new Wideband.. and use it that way.. your OEM 02 isnt gonna be effected that much... but you want a true reading out of your wideband...