when you install an access port in your subaru, it marries itself to your ecu, and no matter what map you're currently running, you can always switch to the map that's designated, "married stock mode" or "revert to stock". This will hide the fact that you have an access port installed in your car. However, if you are really worried about it, simply "unmarry" it from your ecu before you take it to the dealerhip. They'll never know. Good luck man.