I am getting my downpipe welded up tomorrow and need to know where in it do I need to put the o2 sensor. It is a 4 wire sensor that will be for both the closed loop function on the haltech and also the wide band tuning sensor. The one sensor will do both jobs if I get the wideband controller from Haltech. Thanks

NM, got an answer from the guys at Speedmachine.

what did they say sean? i would think to put it a little lower seeing that if its up top you'll be dealign with flame instead of exhaust. Also what haltech do you have?

They said to put it about 6" from the outlet of the turbo, I thought that would be too close, but that is where they said to run it. I have the E6x.