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Hey Everyone! I've had my face buried in the forums for the past few months researching before I begin my own turbo build. I've read hundreds of threads, but I've recently started noticing "Step Down Harness(es)" I guess this converts from obd2a to obd1? I will be building a d16y8. So I'm curious why one does this? That is basically it, Why do need a step down harness, why not stay obd2, is it because of tuning/smog issues? BTW I want to pass smog and I don't live in Cali so I have some leeway.
Thanks for any help provided to help with my research. Hopefully none of you are from hater tech lol.
 
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