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I am about to do H/I/E and was thinking about a reflash and kpro later down the line. But what i want to know if reflash eliminates secondary o2 sensor for running a raceheader? Would i have to run a deflouer?
 

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Only RH reflash eliminates that and the RH reflash is no longer available. It was never available for 02-04 either. So yes you would need to run a defouler.
 
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