Legal notice

Legal Notice

TSM Calibrations sells custom vehicle calibration files, tuning devices, parts, and merchandise. Please read before purchasing.

Off-road and competition use. Certain calibrations are intended solely for vehicles used in closed-course competition or off-highway applications and may modify or disable factory emissions-related systems. Such products are not legal for use on public roads in the United States and may not be legal in your jurisdiction. It is your responsibility to know and comply with all federal, state, and local laws, including the Clean Air Act and CARB regulations, before purchasing or installing any product.

No warranty. Modifying a vehicle's factory calibration may void the manufacturer's warranty. All tuning products are provided "as is" with no warranty of any kind and no guarantee of any specific performance result.

Your vehicle, your risk. You are responsible for the mechanical condition of your vehicle and the accuracy of the information you provide. TSM Calibrations is not liable for engine, transmission, drivetrain, or other vehicle damage, repair costs, loss of use, or injury arising from the installation or use of any product.

All tuning sales are final. Calibration files are built for a single vehicle by VIN and cannot be refunded, exchanged, or transferred.

Trademarks. Duramax, Cummins, Power Stroke, Chevrolet, GMC, Ram, Ford, and other names are trademarks of their respective owners and are used for identification only. TSM Calibrations is not affiliated with or endorsed by any vehicle manufacturer.

Full details are in our Terms of Service, Refund Policy, and Privacy Policy.