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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 4 Reviews
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    Filter Reviews:
      Matthew R.
      United Kingdom United Kingdom

      Nice addition

      Finish the exhaust up nicely and altogether a nice sound and performance improvement very happy.

      Alex B.
      United Kingdom United Kingdom

      Awesome hardware

      I fitted this along with the downpipe after fitting the GPF-Back a few days ago. It's very easy to install and comes with all the hardware necessary. The gasket is supplied with the downpipe and I would not recommend purchasing this without also fitting the downpipe at the same time. You also need to have the GPF-Back installed before installing this. This along with the downpipe and GPF-Back give the car that extra oomph both in terms of power and sound. The revs are louder and deeper along with the pops and bangs, but in normal driving mode, the sound is reasonable. I wouldn't hesitate to install this and I highly recommend you do the same.

      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