To flash an OTS map, select the tab Tune > Flash an MHD Map > Version (if applicable). You will then see a screen like the following. There are a few important parts to this screen.
NOTE: the available OTS stages vary per vehicle / engine. If your modifications fall outside the common Stages, a custom tune may be necessary.
Navigating the OTS Maps Screen
Fuel: this toggle simply switches the fuel ratings you see from the USA Octane scale to the RON scale.
Transmission: if visible, a selection is required. This will apply the appropriate torque scaling for your vehicle’s transmission.
Stage: you should select the appropriate stage for the level of modification of your vehicle. The recommended mods for each are always listed underneath the stage name.
Stage Fuel: this bar is tappable separate from the Stage button itself. Use this to select the actual octane / RON fuel you will be using with the Stage map. NOTE: available fuel options will vary between stages.