Wide band air/fuel sensor install

[mjbjck]

Hi Guys

I have ordered a AEM wideband sensor. I have a 4-2-1 down pipe with with stock O2 sensor connected, I guess i will need to add the second sensor or can i replace the O2. If i replace will the MIL light come on?

Also with the 4-2-1 i will be struggling for space to drill a hole for the second sensor, just a bit concerned if i move the sensor further the readings will not be very accurate?

any help would be appreciated

 

[firebass]

i installed mine after the headers end at the 10 cm after the start of the downpipe check the highlight in foto, i got it there 10 years no problem at all readings are fast, just make a new whole there and finish