Id go w/ no. I know atleast w/ a s/c programmer it can slightly advance your timing so running a lesser octane would create a knock. Ive also read in alotta places that your computer will eventually learn around your jet back to stock but is not the case w/ a programmer seeing that it reflashes that. Im not sure exactly how a the jet chips work but Im pretty sure they dont re flash the pcm so imo thatd be a waste of money someone correct me if im wrong here
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