I have been lurking for a bit and thought this would be as good an excuse to post as any. I am not sure how BMW (or any other manufacturer) could track a piggyback system like the PROcede. Since it is not actually affecting the programming of the ECU, removing it should leave no footprint. This differs from systems like the Cobb Accessport I have on my car which actually reflashes the ECU. Even though the car can be "reflashed" to stock, there have been rumors that such changes can be detected.
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