The mountune m365 power upgrade for the manual and automatic Mk4 Focus ST takes power and torque to another level, delivering effortless performance, even more drivability and a soundtrack that really befits Ford's flagship ST model.

Utilising the required, carefully engineered hardware upgrades to reduce a substantial bottleneck in the exhaust system, the m365 calibration fully optimises this available headway and increases peak power to 365PS, with torque raised to a substantial 560Nm.

As with all mountune upgrades, it's had to pass our own stringent durability testing criteria, which included tens of thousands of miles and many months accumulating extensive data based on different driving scenarios from road to track and when used on different fuel octane ratings to ensure engine robustness, so you can still have complete peace of mind.

Careful attention has been paid to ensure that whilst brutally fast, m365 is still compliant, refined and useable on an every day basis - equally, the way in which the torque is produced and spread across the rev-range means you'll get instant response regardless of where you are in the rev-range and a top end that's rewarding to rev.

As with our previous m330 calibration, m365 is applied using our mTune SMARTflash app, so programming your ECU is also an easy DIY job; all you need is our app, the supplied Bluetooth OBD interface and your Smartphone; no laptop, no wires, no handsets, no problem!

Please note: in order to update to our SMARTflash V2 release, you will now need to download our partner app, ECU Connect - once 'mountune' is selected within the tuner menu of the app you will have full access to the SMARTflash V2 features.

The m365 calibration has been fully optimised to utilise the mountune high-flow panel filter, 3" downpipe sports cat and 3" sport GPF (3" GPF-back exhaust also strongly recommended) and is compatible with all known regional variations including manual and automatic transmission options.

Using the m365 calibration without the suggested supporting hardware will not produce the published power and torque increases and is not recommended.

Installed or removed in minutes, anywhere in the world, you could say the power's in your hands, quite literally!

The iPhone device is shown for illustration of SMARTflash app only, and is not included with this product.