WTB:Highflow cat or testpipe
#6
with a test pipe you are going to throw a code whether the o2 sensor is in the pipe or not. To eliminate the code you will need a o2sim. the cat 02 sensor does nothing for engine operation so its not going to cause misfiring, mpg decrease, etc.
#9
If you really dont want a code and you get a test pipe, you will need an o2sim, no matter where your o2 sensor is.
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