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1.0 mk3 exhaust

Bol
Bol
in Ford Focus Club

Featured Replies

Good day.

 

Does anyone know the (stock) downpipe's bore diameter? Total diameter, the top part.

Is it 63mm or 60mm?

Then it goes down as 55mm and rest of the exhaust's pipe is 45mm.

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    • Author

    About that part. What's the external diameter?

     

     

    IMG_20250215_131236.jpg

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    • Author

    It starts 60,50 mm then around 56,00 mm  the top part.

     

     

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    • Author

    Only the low part remains to be measured.

     

     

    Screenshot_2025-01-21-14-14-18-202-edit_org.mozilla.firefox.jpg.f40bab8204833efec53ed6646f7a289d.jpg

  • Quote
    • Author

    The only question i have is what is the diameter of flexi part. Stock diameter before (from engine) the resonator.

     

  • Quote
    • Author

    I measured the downpipe low part it is around 56mm. 

  • Quote
    • Haha 1
    8 minutes ago, Bol said:

    I measured the downpipe low part it is 7 inches so it is around 56mm. 

    What's that in Celsius? 😂

  • Quote
    • Author

    External millimeters pipe diameter - stock.

    So top and low parts are around 56 mm mainly.

  • Quote
    31 minutes ago, Bol said:

    External millimeters pipe diameter - stock.

    I think you misunderstand my comment. I was having a laugh that you measured the circumference in inches and then quoted the diameter in millimetres 😉

  • Quote
    • Thanks 1
    • 1 year later...
    • Author

    The best thing for stock or for the - so called - first stage remap/tune is to keep the stock downpipe.

    For even more increased performance the downpipe usually should be replaced with a 60mm or 63mm pipe including 200 cpsi catalyst (according to requirements).

  • Quote

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