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Any help? What can I do to my rear diffuser /how can I fit an ST diffuser

Tom palmer
Tom palmer
in Ford Fiesta Club

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I have a 2015 fiesta mk7.5 with the ugly solid plastic rear diffuser and I don’t know how I can change it to the ST diffuser or even the Zetec S , there are no discussions on here about such topic and I was wondering if anyone knew the answer

  • Quote


    Yes you can change it, you drill out a few rivets underneath then pull it off, aswell as the 2 parts of the ST diffuser you also need the 2 trims for either side of the bumper, it might be easier to find a complete ST bumper and swap it

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    Yes, as Mark says above. If you have a look at the "Ford Project and Build Threads Forum" on here there are several threads that cover this in detail, which you may find helpful.

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    • Thanks 1
    • Author
    2 hours ago, MarksST said:

    Yes you can change it, you drill out a few rivets underneath then pull it off, aswell as the 2 parts of the ST diffuser you also need the 2 trims for either side of the bumper, it might be easier to find a complete ST bumper and swap it

    Is it just a straight swap then , because that is what I am looking to do ? And would you know anywhere that would sell them , cheers.

  • Quote
    1 hour ago, Tom palmer said:

    Is it just a straight swap then , because that is what I am looking to do ? And would you know anywhere that would sell them , cheers.

    Ford does, but no idea of the part number.

    eBay, If you know what you are looking for. 

  • Quote
    • Author
    7 hours ago, craig26283 said:

    Ford does, but no idea of the part number.

    eBay, If you know what you are looking for. 

    So it is just a straight swap ?

  • Quote

    The thread below has this (and most other mods) pretty well covered.

    If you are just looking for something more interesting than the standard valence, then the Zetec S/ST line diffuser is a straight swap afaik, bearing in mind you need the side pieces for the full look as Mark mentioned above.

    Most people fit the ST diffuser because they want to also add a twin outlet exhaust - if you don't you are left with a gap. Again the thread below covers this in detail with sources and part numbers. Parts sometimes come up in the "For Sale" section on here, otherwise Ebay, or Ford for new parts, Pumaspeed and Mountune also have ST diffuser/exhaust conversions on their websites.

     

     

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