I think I'm going to order an o/r pro-chamber (and pypes cats for splicing too) and just wanted to see if i'll need the extensions or not. I'd prefer not to have to spend the extra money if necessary, but I also want to do it right...i searched for anything on this, but didn't really find anything specific...

 

I am not sure what an O2 extension is, but I just pluged in the factor 02 sensors into the legs of the pro-chamber. I have driven about 1000 miles and CEL does not come on and when I check with the tuner, no trouble codes found.

 

the extensions just lengthen the amount of wire between in the event the new bung locations are too far away to reach....as for your cel not coming on, if you have a tune, they might have turned the rears off....

 

No extention needed. My tune is not set for an O/R pipe. I didn't change the tune when I installed the O/R prochamber. The predator doesn't allow you to turn of the O2 sensor.

 

turned the rears off on my 04 cobra with a predator tune

 

The updated tune file for the predator doesn't let you turn it off, at least tuner for the 05-06 doesn't. I would assume the 07-08 would be the same.