Subaru WRX, STI 08-21/Forester 08-18/Liberty 04-17
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$69.95
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New stock replacement type air filter utilizing newly developed dry non-woven fabric filter. High dust collection capacity and low resistance are implemented together at a high level.
Newly Developed Dry Non-woven Fabric Filter
The density gradient structure where filter density becomes higher with each layer ensures all sizes of dust and other particles are caught in the most effective way. Optimizing the fiber components reduces the ventilation resistance.
Low Resistance & High Dust Collection Capacity
Even though the intake resistance is reduced, the dust collection capacity is higher than previous model. (Collected more than 95% dust volume during in-house testing) Reliably capturing dust to provide clean air to the engine.
Long-term Low Resistance
Even after long-term use of the filter, the intake resistance stays as low as new.
Filter Structure Comparison
A pleated type sports filter usually collects various sizes of dust on its surface; therefore, air passage becomes narrower which easily causes filter clogging even initial ventilation resistance is low. HKS Super Air Filter utilizes the density gradient structure where filter density becomes higher with each layer ensures all sizes of dust and other particles are caught gradually which maintains proper air passage resulting in a long product life.
Vehicle Fitment:
Measure OEM filter and compare with diagram in second image above
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