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23 reviews


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.

Customer Reviews
5.0 Based on 23 Reviews
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Filter Reviews:
    Luke C.
    United Kingdom United Kingdom
    A real blast

    I’ve had a few maps from other tuners and mountune really set them selves apart. Upgrading from the m235 to the m260 was a no brainier and it made the st go from quick to ridiculous. Serious bang for your buck money. Just do it.

    Belgium Belgium
    m235 to m260

    Don't hesitate! This map is just amazing. Boost every time, everywhere ! Thank you mountune !

    Matthew J.
    United Kingdom United Kingdom
    Great upgrade from M235

    After enjoying the 235 upgrade I just had to try the 260 and I was not disappointed. Files uploaded easy with the dongle and the driving experience is massively improved