Megasquirt Firmware Downloads

• MS1/Extra and MS1/Extra HR Firmware†

†Most applications using MS1 based ECU's will require this firmware.

• MS2/Extra Release Firmware†

• MS2/Extra Beta Firmware
• MS2/Extra Alpha Firmware

†Most applications using MS2 based ECU's will require this firmware version. Be advised that other MS2/Extra firmware versions are not support and may not be fully stable.

• MS3 Release Firmware†

• MS3 Release Candidate Firmware
• MS3 Beta Firmware
• MS3 Alpha Firmware

†Most applications using MS3 based ECU's will require this firmware version. Be advised that other MS3 firmware versions are not support and may not be fully stable.

• Standard B&G Firmware Files
• Standard B&G Firmware INI Files (For MegaTune & TunerStudio)

Firmware files use the ”.S19” file extension. The standard MS-I Firmware is labeled “megasquirt.s19,” whereas the MS-II firmware is labeled “Monitor_vX.XXX.abs.s19” where X.XXX is the version number. Configuration files use the ”.INI” and are used by MegaTune and TunerStudio to interface with the ECU and interact with the user.

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