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Cat Back Exhaust [Mk7 Fiesta 1.0 EcoBoost]

Diffuser option: less Diffuser

The mountune Mk7 Fiesta 1.0 Cat Back Exhaust reduces back-pressure and improves performance, whilst keeping cabin intrusion / boom to a minimum.

A Helmholtz chamber design is utilised in the rear silencer which helps to cancel out unwanted frequencies due to the way in which the exhaust gas waves are reflected. Utilising this system, despite being more complicated and expensive to manufacturer, ensures back-pressure remains low, providing the optimum in terms of performance, whilst removing as many of the unwanted frequencies / cabin boom as possible.

The staggered tail-pipe trim adds to the occasion and both trims feature laser-etched mountune 'racing flag' logos.


  • High-flow cat-back exhaust design improves performance
  • Engineered Helmholtz resonator for a less intrusive, performance sound
  • High quality stainless construction with CNC welds
  • Staggered, twin-tailpipe trims with laser-etched mountune racing flag logos
  • Limited lifetime warranty

Note: If this item is fitted with the mountune Exhaust Isolator, we recommend using two isolators on the silencer only.

PLEASE NOTE: Due to the outlet position of the tailpipe trims, an aftermarket ST-style, or genuine Ford Fiesta ST lower diffuser section is required to ensure correct visual appearance.


Customer Reviews
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    United Kingdom United Kingdom

    Great Exhaust

    I purchased the exhaust through Hendy Performance but wanted to add my review here. I wanted an exhaust that made my 1.0 fiesta sound better but not obnoxiously loud. This exhaust is perfect, loud enough to make me smile every time I put my foot down but loud enough create an angry mob out of my neighbours. It doesn’t drone on the motorway either. I DIY fitted it with a TRC rear diffuser which looks great with it. I’m no expert on quality but it seems really well made to me, nice shiny exhaust tips, easy to polish up too.

    mountune Cat Back Exhaust [Mk7 Fiesta 1.0 EcoBoost] Review
    Emily W.
    United Kingdom United Kingdom

    Mountune cat back exhaust fiesta mk7.5 1.0

    So pleased with my new exhaust, it sounds so great on idle, but it doesn’t drone when driving at constant speed like motorways. A lovely deep rumble.. The tailpipe has a lovely finish and cleans up easily with a touch of metal polish, the build quality seems well made, customer service throughout the purchase was spot on!! Thank you

    mountune Cat Back Exhaust [Mk7 Fiesta 1.0 EcoBoost] Review
    United Kingdom United Kingdom

    Fiesta mk7 ecoboost exhaust

    Great quality exhaust, advertised cat back but it isn't still uses original pipe from cat and middle box had to get the rest made now it great so beware of what you are buying I didn't realise until fitted happy no though