Well, it does say this:
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"If you purchased Osiris Standard or Tuner, from our web-store(or second hand), we can add the 2-Step Feature, to your current tune. You will need to email
sales@uprev.com with your Order# in the subject field. This is currently only available for the 370Z and the G37 manual transmission models. Include your ECU part number (23710-?????) and/or copy of your ROM file in the email to
sales@uprev.com "
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