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K&N High Flow Air Filter - Subaru Models (inc. 2002-2007 WRX/STi / 1990-2004 Legacy)
K&N High Flow Air Filter - Subaru Models (inc. 2002-2007 WRX/STi / 1990-2004 Legacy)
K&N High Flow Air Filter - Subaru Models (inc. 2002-2007 WRX/STi / 1990-2004 Legacy)

K&N High Flow Air Filter

Subaru Models (inc. 2002-2007 WRX/STi / 1990-2004 Legacy)

Read 4 Reviews | 4 Q&As
Part # 33-2232
msrp: $86.99

In stock!

Features & Product Details

RallySport Direct proudly carries quality intake system upgrades and replacements brought to you by the leaders in the industry, K&N. 

Here, you are looking at the K&N High Flow Air Filter. This is a high-performance direct replacement of your factory intake filter designed to provide better filtering capabilities while allows for better airflow for improved performance. 

  • Designed to improve power and rate of acceleration
  • Can be cleaned and used again
  • High air flow with exceptional filtration
  • Lasts up to 50,000 miles before cleaning is required depending on driving conditions
  • Works with original equipment manufacturer vehicle electronics
  • Emissions legal in all 50 US states
  • Will NOT void your vehicle warranty
  • Direct fitment into factory airbox 
  • Specifications

    Brand: KN
    Filter Color: Red
    Filter Element Type: Wet
    Filter Material: Cotton
    Filter Reusable: Yes
    Mfgr. Warranty: Million Mile
    Condition: New Product
    Return Policy:

    RallySport Guarantee - 30 Days

    Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

    RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

    The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
    WARNING: Cancer and Reproductive Harm -



    4 Reviews
    4.3 out of 5 Stars
    5 Stars
    4 Stars
    3 Stars
    2 Stars
    1 Stars
    Customer Photos and Videos
    No user media. You can upload a photo or video of your install by posting a review.
    Easy filter upgrade 6 years ago
    5out of 5stars

    Great! Easy! Fast! No noise increase, does the job I need at a price I can manage. Easy to install... trick is to hold this in place in the top half of the air box and then put them in place together... slipped right in.
    Was this review helpful?
    Too thick 6 years ago
    2out of 5stars

    I installed this in my 07 WRX and it is just too thick around the edges to easily install. I really had to fight to get the two lower tabs to engage. Now, one year later I just noticed the plastic tabs on my air box are cracked from the stress.
    Was this review helpful?
    Solid work 6 years ago
    5out of 5stars

    K&N has always made good products - this is no different. I've got a 3 Catless header-back exhaust with a stage 2 tune, and the butt-dyno says that this helps to even out the air flow. Haven't had it long enough to speak towards its lifespan, but they're washable/reusable so it's a moot point. Would recommend.
    Was this review helpful?
    Surprisingle Effective 6 years ago
    5out of 5stars

    I noticed an IMMEDIATE difference after installing this. There was more power all around. My car pulls harder in fifth and can handle cruising at lower revs in all gears. Additionally I had some bucking and drivability issues at low speeds in first, this has almost totally eliminated them. Unbelievable how big of a difference this made!
    Was this review helpful?


    • Q: Tune with catless up pipe?  redwarblade264266 years ago

      If I have a catless up pipe in a 2002 wrx will installing this require a retune?
    • Q: Stock Filter  tempemail55a97effcaae5282028d51b76 years ago

      This filter can replace my stock filter? What's the difference from my stock filter being dry and this one being wet?
      • 0 of 0 people found the following answer helpful

        A:  Yes, this will replace your OEM filter. With this being a wet filter, it will be oiled. The oil is what helps filter outside particles from coming into the engine.

        Brady R. @ RallySport Direct 6 years ago  
        Was this answer helpful?
    • Q: Horsepower  JamesCarroll7 years ago

      Will this actually add any horse power? And what happens if I get oil on the MAF?
      • 0 of 0 people found the following answer helpful

        A:  You will gain power by replacing your stock air filter with a high flow filter. If the MAF sensor gets oil on it, then it will not read correctly and will cause the car to run poorly. You can clean the MAF sensor and you won't have any problems as long as you don't over oil the filter.

        Zach G. @ RallySport Direct 7 years ago  
        Was this answer helpful?

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