M375 (mTune only) - RS


The mTune is a powerful handset that not only boasts the features listed below, it also facilitates easy mountune calibration updates, migration to higher power levels and new functionality.

This option is for customers who already have the hardware required for the mountune M375 upgrade kit installed on their Focus RS and that require the supporting calibration and / or that want to benefit from the additional functionality of the mTune handset and is supplied with two mountune badges.

Required Hardware 

Once upgraded, power is boosted to 375PS from 350PS, whilst torque is increased from 470Nm to 510Nm (on overboost), which is enough to achieve 0-62mph in just 4.5secs!

mTune Features

  • ECU performance calibration transfer
  • Supplied complete with two user-interchangeable calibrations
  1. M375 calibration
  2. Anti-theft mode (will be supported in future firmware update)
  • DYNO MODE - Enable / Disable RDU with the push of a button for easy dyno operation and when only 2WD dyno is available.
  • In-field calibration updates
  • 0-60 times
  • ¼ mile times
  • Monitor 6 OBD channels
  • Adjustable shift light
  • Full data logging
  • DTC reading / clearing
  • Soft touch rear case
  • LCD screen
  • Ambient light sensor

    Please Note: The warranty of the vehicle being updated with this upgrade may be affected. The M375 upgrade kit is not Ford-endorsed. 

    To maintain any warranty provision otherwise entitled to you, and to ensure correct operation and reliability, calibrations loaded via an mTune handset must be installed together with the correct mountune® hardware.

    NOT COMPATIBLE with vehicles in North America. Please visit our US website for compatible Focus RS products - www.mountuneusa.com

    Customer Reviews

    3.7 Based on 3 Reviews
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    Michael J.
    United Kingdom United Kingdom

    M375 (mTune only)

    Brilliant tune it was easy to install,another great buy from Mountune

    Philip S.
    United Kingdom


    Had the RS for 35k miles before fitting the tune, the air intake and the recirculating valve. I've had Mountune upgrades before on my Focus ST and Fiesta ST and have been very happy with them. This one is no exception. While it is a conservative tune and 0-62 doesn't seem much faster the way it is delivered certainly changes. Mid range is better and the car is more flexible as a result and once on song it certainly widens your eyes. Well worth the upgrade.

    United Kingdom

    Ant theft mode missing

    Ordered m375 on 06 Aug. Order confirmed that units would be dispatched by 08 Aug. This came and went with no delivery. Chased this online and didn't hear back til 15 aug that they needed further info. This was provided same day, then again next day, after we were contacted for the info again. Confirmed on 17 Aug that this would ship Asap, but never shipped until 21 aug. Received on 22 aug. Unpacked box to find there were no badges as described. Contacted info@mountune same day and got a response saying these would be shipped Asap. As of 31 aug I am still waiting for these, with no idea when to expect them. Installed handset on 23 aug and as there were very little instructions provided, had watched some youtube videos for how to set up. The video directed me to where the anti theft mode should be, however only the 375 map was listed here. Also the handset seems to be severely restricted compared to its capabilities. Only 7 parameters that can be monitored and most of these are useless. It does not register boost pressure either. Having said that, the map is stunning, but my experience with mountune has been challenging to say the least.

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