When stacking JMS BoostMAX with an aftermarket ecu tune, it will need to be specifically setup to work with BoostMAX (modified so NO boost is added in the tune).
We offer a JMS ECU calibration that is specifically designed to be stacked with BoostMAX (delivered via an SCT X4). For more information on a custom tune file designed to be used with BoostMAX, or PedalMAX, please call us at (601) 766-9424.