Mk8 Fiesta ST m225 SMARTflash Upgrade - Fully Fitted at mountune HQ


The mountune m225 power upgrade releases the true potential from your Mk8 Fiesta ST, substantially yet safely raising power and torque output from the ST's 1.5-litre 3-cylinder EcoBoost engine; improving performance and drivability, whilst adding a host of functionality, unique to mountune.

As with all mountune upgrades, the m225 upgrade has had to pass our own stringent durability testing criteria, whilst retaining all safety parameters, so you can have complete peace of mind that you're not just buying the best upgrade for your Fiesta ST, but also the most robust aftermarket calibration too.

Peak power is increased to 225PS, whilst torque is uplifted to 340Nm, but as can be seen from the power graphs it's the substantial increase throughout the rev-range, and the way the torque is delivered, that transforms the driving experience.

Working together with industry leading software and hardware teams has enabled the very latest technology available to be incorporated, taking mTune - and making it a whole lot smarter!

The mTune SMARTflash app allows you to easily DIY install and update calibrations to your ECU using nothing more than our app, the supplied Bluetooth OBD interface and your Smartphone; no laptop, no wires, no handsets, no problem!

m225 SMARTflash includes three calibrations, with unique functionality:

m225 performance

Increased power and torque
More aggressive launch control strategy
Enhanced audible exhaust output in Sport / Track modes
  • Stock performance
  • Anti-theft

In addition, the SMARTflash app, which is available for Apple and Android users, also allows for easy future calibration updates and includes a handy VIN and calibration ID reader as standard.

The m225 calibration has been fully optimised around the mountune induction kit, which itself delivers a 
1.5kPa pressure drop, allowing the engine and turbocharger to work more efficiently in achieving the increase in power and torque.

Induction noise is also boosted and, with an engineered approach that retains the OE appearance, the airbox provides a subtle improvement to engine bay aesthetics, whilst also capable of flowing enough air to support further, future increases in power output.

m225 is available in two versions that support all known regional variations and as it can be installed and removed anywhere in the world, at any time yourself, you could say the power's in your hands, quite literally!

  • mTune SMARTflash m225 upgrade
    (supplied with induction kit)
  • mTune SMARTflash m225 lite
    (for owners that have already upgraded their induction kit)

Please make your selection from the drop-down below.

Please note: the price shown for this product includes installation* at mountune HQ in Hutton, Essex and is not transferrable to any other Ford dealer or installer.

Please specify your preferred installation date in the 'notes' section when checking-out; our workshop team will then contact you back to confirm this date. If we can't accommodate your preferred choice, the team will discuss with you other available dates, that are still acceptable to you.

*subject to availability. Lead times may vary. Contact us for more information.

Kit Type

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Filter Reviews:
    Christian A.

    M225 upgrade for Fiesta STmk8

    The whole buying experience and then a short notice booking of the fitting was very professionally handled. Fitting at Mountune HQ was great. If only all customer lounges were like this. Smart tv, games consoles free drinks and snacks etc and comfy leather seats, surrounded by cool car parts and clothing meant it was like a man cave which I loved. The install was super quick. Ryan Sinclair my contact was really attentive and helpful and really couldn’t do enough. I decided whilst I was there to have the throttle body elbow and it was installed with no problem despite the late notice. The car feels much more urgent and makes a few extra pops on gear changes as well as sounding more meaty. Really does feel night and day different. I am keen to have more things fitted when they come out. Despite the distance as I live in Derby, Mountune HQ fitting is the way to go. Thanks very much once again, brilliant service and great products.

    Gordon H.

    Just brilliant

    Had my week old Mk8 upgraded to the M225, along with the high induction kit and throttle body elbow (if you can, get the 3 as they compliment each other really well) …. an already brilliant car is even better (at all levels from additional performance and torque, through to the additional security you get with the immobiliser capability). Service there fab as always (nice environment to be at, Ryan, Fred and co great)

    United Kingdom

    m225 Upgrade

    Fantastic upgrade. Had a really pleasant trip to Mountune for the fitting, everyone was friendly and it was done in no time. The actual upgrade is amazing, exactly what you expect from these guys. It now feels like how I imagined an ST to feel.