All 4 cats are connected, not just 2. You are going to need one pair of o2 extenders like you stated. It is very possible that the aftermarket pipe may trip your check engine light. If this happens, look into getting some MIL eliminators.4.6guru said:I currrently have 4 cats on my '04 GT. I plan on going with either a UPR or magnaflow catted X-pipe (both with 2 cats). My first question is...are currently, all 4 of my cats connected to the computer via O2 sensors, or just 2 or them? So when I go with one of these aftermarket x-pipes, will I need just one pair of O2 extenders? Also, will I or will I not need MIL eliminators? Keep in mind this is a CA stang. Thanks for the help. -Eric
04's have the bungs for the o2's placed in different places due to the different location of the cats....JUST THE 04's(wanted us to spend more moneychristiesledd said:why would he need o2 extensions? shouldn't they plug into the same place on the new x-pipe? I needed them when I got long tubes because it moved the spot down lower. Also I went completely catless and never tripped the check engine light
christiesledd said:ahhh.. that's right, I didn't even notice it was an 04
from Steeda.com4.6guru said:ok, so I will need extenders and I will maybe need MIL eliminators. Can someone tell me what MIL eliminators are and why I would need them, and where they go on the car. Thanks.
i have heard numerous stories where you dont need them. i was just saying, if you installed it and got that light and it wouldnt go away, that you could get MIL's. You prob. wont need them, so dont worry about them. i just wanted you to know what to expect.4.6guru said:yeah but they are $60 and if I don't need them I don't want them. What I do need is to have someone with an '04 GT to come in here that has doen the X-pipe because it seems all the years were a little different when it comes to exhaust. Thanks guys.
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