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Subaru WRX STI Replacement Air Filters

Buy now from K&N's Online Store and get a 100% money back guarantee on any Subaru WRX STI air filter!

  • Designed to Increase Horsepower and Acceleration
  • High Air Flow with Excellent Filtration
  • Top Performance Accessory for Subaru WRX STI Models
  • K&N Million Mile Limited Warranty®

Order your K&N replacement air filter Factory Direct today! Help your Subaru WRX STI run better. Fast and FREE SHIPPING with any Subaru WRX STI air filter

  1. 2021 Subaru WRX STI 2.5L H4 Gas air filter
    Special Price RSD 6,525.78 Regular Price RSD 8,700.65
    33-5092
    K&N
  2. 2020 Subaru WRX STI 2.5L H4 Gas air filter
    Special Price RSD 6,525.78 Regular Price RSD 8,700.65
    33-5092
    K&N
  3. 2019 Subaru WRX STI 2.5L H4 Gas air filter
    Special Price RSD 6,525.78 Regular Price RSD 8,700.65
    33-5092
    K&N
  4. K&N Long Life 18,000 Mile Engine Air Filter - SUBARU OUTBACK/LEG/ IMPREZA/ FORESTER
  5. K&N Extended Life 24,000 Mile Engine Air Filter - SUBARU OUTBACK/ LEG/ IMPREZA/ FORESTER
  6. 2018 Subaru WRX STI 2.5L H4 Gas air filter
    Special Price RSD 6,525.78 Regular Price RSD 8,700.65
    33-2304
    K&N
  7. K&N Extended Life 24,000 Mile Engine Air Filter - SUBARU OUTBACK/ LEG/ IMPREZA/ FORESTER
  8. K&N Long Life 18,000 Mile Engine Air Filter - SUBARU OUTBACK/LEG/ IMPREZA/ FORESTER
  9. 2017 Subaru WRX STI 2.5L H4 Gas air filter
    Special Price RSD 6,525.78 Regular Price RSD 8,700.65
    33-2304
    K&N
  10. 2016 Subaru WRX STI 2.5L H4 Gas air filter
    Special Price RSD 6,525.78 Regular Price RSD 8,700.65
    33-2304
    K&N
  11. K&N Long Life 18,000 Mile Engine Air Filter - SUBARU OUTBACK/LEG/ IMPREZA/ FORESTER
  12. K&N Extended Life 24,000 Mile Engine Air Filter - SUBARU OUTBACK/ LEG/ IMPREZA/ FORESTER
  13. K&N Long Life 18,000 Mile Engine Air Filter - SUBARU OUTBACK/LEG/ IMPREZA/ FORESTER
  14. K&N Extended Life 24,000 Mile Engine Air Filter - SUBARU OUTBACK/ LEG/ IMPREZA/ FORESTER
  15. 2015 Subaru WRX STI 2.5L H4 Gas air filter
    Special Price RSD 6,525.78 Regular Price RSD 8,700.65
    33-2304
    K&N
  16. K&N Long Life 18,000 Mile Engine Air Filter - SUBARU OUTBACK/LEG/ IMPREZA/ FORESTER
  17. K&N Extended Life 24,000 Mile Engine Air Filter - SUBARU OUTBACK/ LEG/ IMPREZA/ FORESTER
  18. 2014 Subaru WRX STI 2.5L H4 Gas air filter
    Special Price RSD 6,525.78 Regular Price RSD 8,700.65
    33-2304
    K&N
  19. 2013 Subaru WRX STI 2.5L H4 Gas air filter
    Special Price RSD 6,525.78 Regular Price RSD 8,700.65
    33-2304
    K&N
  20. K&N Extended Life 24,000 Mile Engine Air Filter - SUBARU OUTBACK/ LEG/ IMPREZA/ FORESTER
  21. K&N Long Life 18,000 Mile Engine Air Filter - SUBARU OUTBACK/LEG/ IMPREZA/ FORESTER
  22. K&N Long Life 18,000 Mile Engine Air Filter - SUBARU OUTBACK/LEG/ IMPREZA/ FORESTER
  23. K&N Extended Life 24,000 Mile Engine Air Filter - SUBARU OUTBACK/ LEG/ IMPREZA/ FORESTER
  24. 2012 Subaru WRX STI 2.5L H4 Gas air filter
    Special Price RSD 6,525.78 Regular Price RSD 8,700.65
    33-2304
    K&N
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