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4 reviews


mTune MR300 Power Upgrade Kit {Mk3 Focus ST 2012-14]

The mountune Racing MR300 upgrade offers Focus ST owners the chance to upgrade to a genuine 300PS and 470Nm experience - the highest power and torque output reliably achievable using the OE turbocharger.

The kit is based on the market-leading MP275 upgrade which consists of:

  • Large-capacity alloy intercooler (powder-coat finish in satin black - with optional logo)
  • Low-loss cast crossover duct with silicone hose (painted satin black with detailed fins and logo)
  • High-flow dual-entry air filter

In addition to this, the MR300 upgrade also adds:

  • High-flow 3" down pipe with 200-cell sports catalyst
  • High-flow 2.5" bore cat-back exhaust
  • High-flow charge pipe upgrade kit
  • High-flow silicone induction hose
  • mTune handset loaded with MR300 calibration

Once upgraded, power increases to 300PS whilst torque is raised to 470Nm.

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

Future mTune firmware updates will allow easy calibration updates, new features to be added and new gauge options to be displayed.

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

Please note: Not compatible with Wagon models.

Customer Reviews
4.8 Based on 4 Reviews
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Filter Reviews:
    United Kingdom

    Build quality was superb, and a great kit from standard. The car pulls so much better than before and the intake noise is lovely, the only reason I am giving it 4 stars instead of 5 is the only part that let's it down is the cat back exhaust. Even though the build quality of the exhaust is brilliant and it looks lovely on the car, it sounds the same as the standered exhaust. To me this really let's it down, not that I wanted an extremely loud exhaust but I wanted to be able to hear it. The central box on the exhaust is massive and removes any noise coming out. It would benefit with the silencer being half the size. Overall great bit of kit but with the money I spent on it I would of liked it to sound how it goes

    Simon H.

    I got the ST as an MP275 with the mountune Cat back exhaust which was an enjoyable car to drive there were a few things i didnt like which were the symposer and the wheel hop which slapped my wrist everytime i really wanted to use the power from the MP275 so i added the roll restrictor and the symposer delete and also the recirc valve as the standard plastic unit isnt the best and i loved the car it was able to use the full MP275 and at that point i was set that it would be even better with the MR300 so i set about getting the needed hardware and accessport with the MR300 and what a transformation it is the mid range punch is much better very pleased with the performance and the handling is further upgraded with the mountune sports spring kit which works very well with the MR300 great upgrades

    Stefan J.
    What a thrill

    I bought my ST MK3 MR 300 a few days ago and It is truly amazing. It's like being in a rocket, the car is very fast. The tourqe is massive and the power makes me smile all the way to the red line. No mather what gear or rpm the power is there, all the time. The exhaust is very silent on the Highway, no drone or anyting like that. This kit is a "must have" for all ST MK3-owners in the world. Stefan (Sweden)