help quick

[four six]

I just bought mils. Do the go up front or back where the o2 sensor would be, I have a O/R X

 

[JohnyD05]

I just bought mils. Do the go up front or back where the o2 sensor would be, I have a O/R X

I have never installed them, but
from what I understand they go in the back. The back o2's compare the gas after the cats (effluent) (if you have them) to what went into (feedstream) the cats and tell you if the cats are working or not (engine light or not).

 

[BooWFO]

back o2's is where they go.

 

[03ghoststang]

they go in the back and in between the O2 sensor's connector

 

[CRZYHRSGT]

Rear. Those sensors read the efficiency of the cats. When you install an O/R pipe you need to trick the ECU with the MILs into thinking that the rears aren't reading the same as the fronts which would cause a code or 2...

 

[four six]

ok thanks. ight came back on. Im thinking its throwing a code so Ill have to get it scanned this weekend. Its kinda BS how the Steeda Mils don't fit perfectly (you need to trim the plastic)