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K&N High Flow Air Filter (Part Number: )
K&N High Flow Air Filter (Part Number: )
K&N High Flow Air Filter (Part Number: )
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: $84.29

In stock! Ships same day

Features & Product Details

K&N’s replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration and increased fuel economy.

Making over 1,200 different replacement air filters for virtually every vehicle on the road. These filters are washable and reusable and are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple. With most vehicles you simply remove the disposable air filter and replace it with a K&N.

K&N stock replacement air filters for street vehicles are covered by the famous K&N Million-Mile Limited Warranty™ and will be THE LAST AIR FILTER YOUR VEHICLE WILL EVER NEED.


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.



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 4 years ago
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.
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Too thick 4 years ago
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.
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Solid work 4 years ago
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.
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Surprisingle Effective 4 years ago
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!
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  • Q: Tune with catless up pipe?  redwarblade264264 years ago

    If I have a catless up pipe in a 2002 wrx will installing this require a retune?
  • Q: Stock Filter  tempemail55a97effcaae5282028d51b75 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 5 years ago  
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  • Q: Horsepower  JamesCarroll6 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 6 years ago  
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This Part Fits

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Alpine Sport
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1990 Subaru Legacy Base
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1995 Subaru Legacy Brighton
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1997 Subaru Legacy Brighton
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2000 Subaru Legacy Brighton
1994 Subaru Legacy GT
1996 Subaru Legacy GT
1997 Subaru Legacy GT
1998 Subaru Legacy GT
1999 Subaru Legacy GT
2000 Subaru Legacy GT
2001 Subaru Legacy GT
2002 Subaru Legacy GT
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2000 Subaru Legacy GT Limited
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1990 Subaru Legacy L
1991 Subaru Legacy L
1992 Subaru Legacy L
1993 Subaru Legacy L
1994 Subaru Legacy L
1995 Subaru Legacy L
1996 Subaru Legacy L
1997 Subaru Legacy L
1998 Subaru Legacy L
1999 Subaru Legacy L
2000 Subaru Legacy L
2001 Subaru Legacy L
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2003 Subaru Legacy L
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1990 Subaru Legacy LS
1991 Subaru Legacy LS
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1994 Subaru Legacy LS
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1994 Subaru Legacy LSi
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1999 Subaru Legacy Limited 30th Anniversary
1995 Subaru Legacy Outback
1996 Subaru Legacy Outback
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1999 Subaru Legacy Outback
Outback Limited
1997 Subaru Legacy Outback Limited
1999 Subaru Legacy Outback Limited
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1995 Subaru Legacy Postal
1996 Subaru Legacy Postal
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SUS 30th Anniversary
1999 Subaru Legacy SUS 30th Anniversary
1991 Subaru Legacy Sport
1992 Subaru Legacy Sport
1993 Subaru Legacy Sport
1994 Subaru Legacy Sport
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