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oxygen sensors

  1. Help Please: 2001 Dakota

    Intake & Exhaust
    Hello All, I own a 2001 dakota quad cab sport w/ 5.9L V8. The exhaust was originally a california emissions exhaust with one large CAT back and two smaller forward CATs on the y-pipe. The two front CATs each had one O2 sensor front and one behind. Fronts are for fuel/air mix. The rears are...
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