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Sport GPF [Mk4 Focus ST]

The mountune Sport GPF for the Mk4 Focus ST has been developed as an effective way to reduce exhaust back-pressure at the turbocharger, improving turbo response and releasing additional power and torque.

Incorporating a larger diameter 3” bore entry and exit with a high-flow GPF housed at its core, you can benefit from a substantial reduction in back-pressure and in-turn enhanced power and torque output across the entire rev-range, whilst still maintaining conformity to UK emissions requirements*.  

The mountune Sport GPF is also supplied with an adaptor pipe which allow easy installation with the mountune GPF-back exhaust system.

Revised engine calibration will be required for optimal performance.


  • 10PS / 10Nm peak power / torque increase
  • High-flow GPF core
  • 3” 304 stainless steel tube
  • Compatible with mountune GPF-back exhaust system.

Recommended to fit in conjunction with mountune Mk4 Focus ST GPF Back Exhaust and mountune Downpipe / Sports Cat.

This product has been designed and is intended for UK markets and complies with UK MOT tailpipe emissions regulations. Installation of this part on a vehicle that is driven on public roads outside the UK may violate other territories laws and regulations relating to emission requirements and motor vehicle safety standards.

*based on the current UK MOT emission testing requirements.

    Customer Reviews
    5.0 Based on 2 Reviews
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    Filter Reviews:
      Colin M.
      United Kingdom United Kingdom

      Easy fit

      Very easy to fit, mating up to the downpipe/sport cat and gpf back exhaust perfectly. The complete mountune exhaust system definitely lets the turbo spin up more quickly.

      mountune Sport GPF [Mk4 Focus ST] Review
      Jonathan K.
      Belgium Belgium

      Bigger and better!

      Easy installation even on jack stands! Installed the GPF for now and sounds a bit different, pops a quite louder. And of course adds noticeable power!

      mountune Sport GPF [Mk4 Focus ST] Review