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GPF-back Exhaust [Mk8/ Mk8.5 Fiesta ST]

Tailpipe Option: Polished
Model Year: Pre-Sep 2020 (3-bolt)

The mountune GPF-back exhaust for the Mk8/ Mk8.5 Fiesta ST gives the 3-cylinder EcoBoost a much more befitting soundtrack, reduces back-pressure and enhances vehicle aesthetics.

Constructed from 60mm 304 stainless steel, the mountune GPF-back system improves vehicle performance thanks to the low-back pressure design, whilst the carefully engineered muffler features a Helmholtz resonator which ensures the cabin remains free from unwanted drone or boom.

The mountune GPF-back also comes supplied complete with a new exhaust valve assembly, so you can easily swap your actuator across to retain full valve control.

Available with either a polished stainless or carbon fibre trim option to suit your individual preference.

This system also includes an adaptor to join it to the OE exhaust - not shown.

PLEASE NOTE: Pre-September 2020 models use a three-bolt valve-motor fixing (see valve assembly guide here). Post-September 2020 models use a single bolt fixing. Please ensure you confirm on your vehicle if you're not sure which you need and then select the correct option required when ordering.


From the GPF all the way to your choice of polished stainless, or carbon fibre trims, the mountuneexhaust system delivers when it comes to quality and detail; from the beautiful TIG welds and engineered features on the outside, to the drone-reducing Helmholtz resonator on the inside, we've got you covered.

Customer Reviews
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    United Kingdom United Kingdom

    Fiesta mk8 at gpf exhaust

    Great product, when in normal mode car sounds nice and quiet for everyday driving, when sport mode is on the sound is greatly enhanced. Very easy to fit, no alignment issues at all.

    emily w.
    United Kingdom United Kingdom

    Mk8 Fiesta GPF Back Exhaust

    I used to own the Mountune exhaust for my MK7.5 1.0 Fiesta previously and was always impressed by the quality and sound so for me this time the decision to buy another Mountune for my Mk8 Fiesta ST was easy! I have had this fitted a little while now and I am not disappointed. As with previous exhaust the sound is pleasant without being intrusive in the cabin, and doesn’t drone on long, constant speed journeys. I opted for the carbon tips to match the carbon of the air filter I also have fitted. Very pleased with the look .

    mountune GPF-back Exhaust [Mk8/ Mk8.5 Fiesta ST] Reviewmountune GPF-back Exhaust [Mk8/ Mk8.5 Fiesta ST] Review
    Stephenie SVG verified by SHOP
    United Kingdom United Kingdom

    Love this