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Im wanting to get a new X or H pipe probably not catted but i was wondering about the O2 sensors and if you can still just plug them in or how that worked?
If you get an offroad midpipe you will need MILs to turn off the CEL. THey take the place of the o2 sensors. Just grab some with your midpipe, you can get some from Jegs.com or whatever.
Malfunction Indicator Lamp or something along those lines. They are the plugs that go into the offroad midpipe so that the check engine light is turned off in the car and it doesn't run overly rich.
they are usually separate. I've heard most are junk, but I have heard great comments about the 'steeda' brand MIL eliminators. When I put in my o/r H I'm buying a set of steeda MIL eliminators