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When I ordered mine, I just sent a money order and all my info on a sheet of paper. If you are ordering the jlt and sct tuner combo you get three tunes included in the pack. Three octanes. Just send them an email with all your info.
If you're paying by Credit Card, you can always just call them.. That's what I did, VERY helpful bunch of guys. So much so, that 4 months after installing my CAI I drove out there for a blower.