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12 reviews


MR300 (mTune only) [Mk3 Focus ST]


This option is for customers with a Mk3 Focus ST and wish to upgrade to MR300 using an mTune, and who fall into one of the following three categories:

  1. MP275 customers who have all the required hardware installed for MR300 but require an mTune and MR300 calibration.
  2. MT275 customers who have all the required MR300 hardware (including an mTune) but require an in-field firmware update to their existing handset.
    In-field firmware updates are facilitated via a bespoke upgrade key. Once ordered we will send you steps to follow in order for you to provide us with your specific mTune serial number. A key will then be generated and sent to you which will enable you to update your mTune's firmware using the AP Manager software.
  3. Customers running all the required MR300 hardware but using standard software, requiring mTune with MR300 calibration.

Required hardware list:

  • mountune alloy intercooler
  • mountune induction kit
  • mountune high-flow induction hose
  • mountune charge pipe upgrade kit
  • mountune downpipe / sportscat
  • mountune cat-back exhaust 

Please note: Installing the MR300 calibration without the correct hardware list above may result in failure to make the quoted power / torque figures, abnormal running, detrimental fuel consumption or engine warning light illumination. In any such instance no warranty is offered or implied by mountune.

mTune features:

  • ECU performance calibration transfer
  • 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
  • Lanyard pin
  • Removable faceplates
  • Ambient light sensor

Each mTune is supplied complete with:

  • Holster with t-slot mounting
  • OBD and USB connection cables
  • Black faceplate
  • mTune zip-up case

Please note: This calibration version is not compatible with vehicles in the USA. Please visit our dedicated website at

Customer Reviews
4.8 Based on 12 Reviews
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Filter Reviews:
    United Kingdom United Kingdom

    M300 Ford Fokus mk3 st

    Great product!!! Thank you!!!

    United Kingdom United Kingdom

    Satisfied Customer

    Whooosh!! The 275 kit is decent, adding a worthwhile extra 25PS/40Nm over standard, but you could just save time, add the additional hardware and jump straight in for for the MR300 calibration, taking it up to 300PS/470Nm, you won't be disappointed. Some may think 50PS/110Nm gain over stock trim is marginal, but when you feel it kick in, you'll come to the quick realisation that it's actually a bit special. MR300 totally transforms the drive, add a Quaife ATB diff into the mix and it becomes the car you always wanted.

    mountune MR300 (mTune only) [Mk3 Focus ST] Review
    Christopher T.
    United Kingdom United Kingdom

    MR300 Map Upgrade.

    Having had all the parts fitted for MR300 I decided it was time to upgrade the map. Unfortunately I did this at the start of lockdown. So I was unable to drive the car. Now I'm back to work and using the car daily i feel it's a good time to review the map. It's great. Nice smooth power delivery. Not sure what I was expecting. My car was a strong 275 before and I cant really notice an additional 25bhp. What I can notice is the extra torque. And it makes the car much easier to live with. I think before on the MP275 map it was great but something was missing. The MR300 fills that gap. It's a no brainer if you have the hardware needed. The only down side is it never came with a new badge and you have to pay postage for an email.



    You should've received an m-flag badge with this kit, so if you didn't, please contact our sales team. Glad you're enjoying the MR300 otherwise!