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mTune SMARTflash m235 to m260 Upgrade [Mk8 Fiesta ST]

This option is for you if you're an existing m225 or m235 SMARTflash customer that wants to take advantage of the enhanced power and torque output of the m260 calibration.

The mountune m260 power upgrade for the Mk8 Fiesta ST takes performance to a whole new level, quite literally, releasing up to 260PS and 365Nm from the ST's 1.5-litre 3-cylinder EcoBoost engine - and all whilst still retaining the factory GPF and catalyst.

The additional torque output is delivered across a wide spread in the rev-range which translates into effortless drivability and totally transforms the overall driving experience and fun-factor. By removing some of the inherent bottlenecks in the OE hardware, the optimised calibration boosts peak power to between 250-260PS and makes it equally rewarding to rev!

As with the previous m225 / m235 releases, for optimum performance, engine efficiency and reliability, we recommend the use of the following hardware when migrating to m260:

The m260 SMARTflash upgrade includes two additional performance calibrations with the following features:

  • m260 performance calibration
Increased power and torque (up to 260PS / 365Nm)
More aggressive launch control strategy
Enhanced audible exhaust output in Sport / Track modes
Optimised no-lift shift functionality
  • m260 performance ASMO calibration 
Increased power and torque (up to 260PS / 365Nm)
More aggressive launch control strategy
Anti Social Mountune Overrun Enhanced audible exhaust output in Sport / Track modes (for those who really like their pops and bangs)

Important please read:
 In order to achieve and maintain performance and reliability, the m260 upgrade should be used in conjunction with the hardware listed and should only be used with 97RON+ fuel. If a lower octane rating of fuel is the only grade available we recommend switching to the m235 calibration which can be used on normal unleaded fuel reliably in all scenarios.

Please specify your vehicle VIN in the notes section when checking out and if the email used to make this purchase is different to the one used for your original m225 / m235 purchase, please also supply that to ensure the industrialised calibration to support your vehicle is created and sent to you correctly. We will not be able to process your order without this information in advance.

The file emailed to you can then be opened via the SMARTflash app and installed to your ECU, as is the case with all previous calibration updates using your OBD bluetooth adaptor.

You will already require an m225 / m235 SMARTflash upgrade / app to be able to install this companion calibration.

Installing the m260 calibration without the correct hardware may result in failure to achieve the quoted power / torque figures, abnormal running, detrimental fuel consumption or engine warning light illumination or, in extreme circumstances, damage to and / or failure of the engine. in any such instance no warranty is offered or implied by mountune.

By purchasing this product you agree for mountune to send you emails about new updates or technical features relating to SMARTflash. You can opt out at any time.

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    Stefano C.
    Italy Italy


    Moooooolto divertente in montagna

    United Kingdom United Kingdom

    no other mods- yet

    I've had M235 for over 10 months, which is fantastic. The standard Mk8 seemed to be lacking vs my previous Mk7 MP215, which this M235 resolved. I brought the M260 and tried it without other mods (except 99 oct fuel), to see if it's worth going the full way (purchasing intercooler etc). Power and acceleration in 3rd is outstanding even without the extras (was only 3 degC outside). I returned the car to M235 for now. I'm still undecided if I'll go back to M260 & buy the rest of the kit but I'll probably want the extra power once summer comes, and tyres have more grip again in the warmer weather.

    United Kingdom United Kingdom

    M260 upgrade

    Well what can I say great upgrade from the 235 map to the 260. Easy purchase with my map sent to me within an hour. Very easy to install that I even did it at services on the motorway. Can feel the car pulling a lot more just gutted I couldn’t use my points towards the update