To ensure compliance with relevant regulations, all ValvePilot controllers are configured to revert to DEFAULT mode each time the vehicle is switched off and then restarted. By default, this mode is set to OEM operation, meaning the exhaust valves behave as originally intended by the manufacturer. If you would prefer the DEFAULT mode to be set to Valves Open, please specify this in your order notes or contact us via email at the time of purchase. Please note that selecting this option will result in the exhaust valves automatically opening every time the vehicle is started.