Ford Focus ST IV Replacement Air Filters

Buy now from K&N's Online Store and get a 100% money back guarantee on any Ford Focus ST IV air filter!

  • Designed to Increase Horsepower and Acceleration
  • High Air Flow with Excellent Filtration
  • Top Performance Accessory for Ford Focus ST IV Models
  • K&N Million Mile Limited Warranty®

Order your K&N replacement air filter Factory Direct today! Help your Ford Focus ST IV run better. Fast and FREE SHIPPING with any Ford Focus ST IV air filter

  1. 2025 Ford Focus ST IV 2.3L L4 Gas air filter
    11.341,45 kr.
    33-3131
    K&N
  2. 2025 Ford Focus ST IV 2.3L L4 Gas air filter
    5.108,62 kr.
    KNX-3131
    K&N
  3. 2024 Ford Focus ST IV 2.3L L4 Gas air filter
    11.341,45 kr.
    33-3131
    K&N
  4. 2024 Ford Focus ST IV 2.3L L4 Gas air filter
    5.108,62 kr.
    KNX-3131
    K&N
  5. 2023 Ford Focus ST IV 2.3L L4 Gas air filter
    11.341,45 kr.
    33-3131
    K&N
  6. 2023 Ford Focus ST IV 2.3L L4 Gas air filter
    5.108,62 kr.
    KNX-3131
    K&N
  7. 2022 Ford Focus ST IV 2.3L L4 Gas air filter
    11.341,45 kr.
    33-3131
    K&N
  8. 2022 Ford Focus ST IV 2.3L L4 Gas air filter
    5.108,62 kr.
    KNX-3131
    K&N
  9. 2021 Ford Focus ST IV 2.3L L4 Gas air filter
    11.341,45 kr.
    33-3131
    K&N
  10. 2021 Ford Focus ST IV 2.3L L4 Gas air filter
    5.108,62 kr.
    KNX-3131
    K&N
  11. 2021 Ford Focus ST IV 2.0L L4 Diesel air filter
    11.341,45 kr.
    33-3131
    K&N
  12. 2021 Ford Focus ST IV 2.0L L4 Diesel air filter
    5.108,62 kr.
    KNX-3131
    K&N
  13. 2020 Ford Focus ST IV 2.3L L4 Gas air filter
    11.341,45 kr.
    33-3131
    K&N
  14. 2020 Ford Focus ST IV 2.3L L4 Gas air filter
    5.108,62 kr.
    KNX-3131
    K&N
  15. 2020 Ford Focus ST IV 2.0L L4 Diesel air filter
    11.341,45 kr.
    33-3131
    K&N
  16. 2020 Ford Focus ST IV 2.0L L4 Diesel air filter
    5.108,62 kr.
    KNX-3131
    K&N
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