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I installed headers and cats on my 2012 300 srt8 6.4L RHD and sounds ok.
Second time driving it engine warning light comes on. After reading and searching here i am thinking the O2 sensor after the high flow cats has been fowled up or faulty. I will get an obd2 scanner to read fault code and see. Question is do you think this could be problem? What can i do to fix? Will installing an O2 sensor spacer in after cats solve problem? Does anyone know the part no for the O2 sensors? Will the ecu require tuning to suit new cats and headers? Can i drive the car with emissions warning light on?

Any help very appreciated. Thank you
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