We send you the X-Treme Cal interface, which is yours to keep. When you receive it, you will read out the factory files and email them to us. We then modify the files to the specific modifications you have then email them back to you to upload into the vehicle. If you modify the car further, you can email us and let us know what you changed, then we modify the files and send them back to you.
Thank you
Regards,
Rick LeBlanc
Livernois Motorsports




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