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14 reviews


mountune High Flow Air Filter [Mk4 Focus]

The mountune high-flow cotton gauze panel filter for the Mk4 Focus provides an instant improvement in both performance and induction noise and is easily installed in less than a minute.

Each mountune filter is manufactured using a multi-stage process resulting in a great fit and virtually no seepage of frame material into the filtration media producing the maximum available filter area.


  • Increased performance
  • Increased induction noise
  • Lightly oiled
  • Includes 'do not discard airbox sticker'
  • Lifetime warranty against manufacturing defects
  • As used in our m330 power upgrade

    Compatible models:

    Mk4 Focus ST 2.3-litre EcoBoost
    Mk4 Focus ST 2.0 EcoBlue (Diesel)
    Mk4 Focus ST-Line 1.5-litre EcoBoost
    Mk4 Focus ST-Line 1.0 EcoBoost

    Customer Reviews
    5.0 Based on 14 Reviews
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    Filter Reviews:
    Kamran M.
    Sweden Sweden
    Mk4 Focus ST

    Perfect and fitted within minutes.

    United Kingdom United Kingdom
    Great service

    Quick and easy

    chris b.
    United Kingdom United Kingdom
    Awesome love mountune stuff!!

    I recently sold my MK3 Focus ST and upgraded to the MK4 ST looking forward to some new bits once developed.