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K&N

K&N Select Engine Air Filter, Dry Synthetic, Washable, Replacement Filter, Compatible with 2003-2021 Subaru H4/H6 1.5/2.0/2.5/3.6L (Forester, Legacy, Outback, Impreza, WRX, Levorg, Crosstrek), SA-2304

Based on 2,179 reviews
Condition: New
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$52.00

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Availability: Only 3 left in stock, order soon!
Fulfilled by Amazon
Arrives Friday, Nov 6
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At a glance

Condition
New
Style
Dry Synthetic
Model
SA-2304
Dimensions
8.75"L x 8.56"W x 0.94"H
Product Grade
Replacement Part
Fit Type
Vehicle Specific Fit
Item Type Name
Replacement Air Filter
In the box
1 Air Filter

Features 5

  • SAVES MONEY: K&N Select washable air filters will save you $200 over 10 years by eliminating the cost of traditional paper filters.
  • ENGINEERED POWER: Premium dry filter media produces up to 35% more airflow than disposable paper filters to increase power and acceleration.
  • HIGH CAPACITY: Up to 50,000 miles between cleanings. Less work, more play. No oiling needed.
  • WORLD CLASS PROTECTION: Pushing the limits of engine protection by protecting your engine from harmful contaminants.

Description

K&N Select air filters are engineered with premium dry filter media to offer increased airflow and reduce maintenance. Each filter is washable and reusable, and backed by a K&N 10-Year Limited Warranty. Reusable filter saves time and money. Up to 35% more airflow. Up to 50,000 miles between cleaning. Vehicle Fitement:2012-2021 SUBARU WRX; 2008-2019 SUBARU Forester; 2005-2019 SUBARU Legacy; 2014-2019 SUBARU Levorg; 2004-2019 SUBARU Outback; 2012-2018 SUBARU WRX STI; 2016-2017 SUBARU Crosstrek; 2008-2017 SUBARU Exiga; 2003-2017 SUBARU Liberty; 2012-2017 SUBARU XV; 2008-2016 SUBARU Impreza; 2008-2016 SUBARU Impreza WRX STi; 2011-2015 LANCIA Thema; 2013-2015 SUBARU XV Crosstrek; 2008-2014 SUBARU Impreza WRX; 2003-2014 SUBARU Legacy IV; 2009-2014 SUBARU Liberty Exiga; 2005-2014 SUBARU Tribeca; 2011-2012 SUBARU Forester Turbo; 2003-2010 SUBARU Legacy III; 2007-2009 SUBARU Impreza II; 2005-2009 SUBARU Legacy GT; 2009 SUBARU Outback III; 2007-2008 SUBARU Impreza II WRX; 2007-2008 SUBARU Impreza II WRX STI; 2008 SUBARU Impreza III; 2008 SUBARU Impreza III WRX STI; 2003-2008 SUBARU Outback II; 2006-2007 SUBARU B9 Tribeca; 2005-2006 SUBARU Outback XT

Specs 15

Product Grade Replacement Part
Brand K&N
Fit Type Vehicle Specific Fit
Product Dimensions 8.75"L x 8.56"W x 0.94"H
OEM Part Number SA-2304
Brand Name K&N
Model Number SA-2304
OEM Equivalent Part Number SA-2304

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Nov 6

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

2016 Subaru WRX approved
Style: Cotton Oil
Perfect, easy replacement for the restrictive stock paper filter on a 2016 Subaru WRX. Start to finish, installation took about two minutes with no tools required -- and this is my first time replacing an engine filter. The filter housing has two clamps that pop right off, and then the housing will open just far enough to replace the filter. After about 13 months / 18k miles, the stock filter was dirty and clogged with leaves, dirt, and bugs. I noticed an instance difference after installing this K&N filter. I can't vouch for a specific improvement in HP or fuel consumption yet, but it definitely feels like the engine has more pep. With the stock filter, switching into second gear at low revs had a sort of hiccup in power delivery, no matter how I engaged the clutch. With the K&N filter installed, that hiccup is gone! The power band feels consistent and slightly more powerful. Couldn't be happier with the purchase. Don't pay a dealer to do replace your engine filter! They will charge anywhere from $70-$100 for a $15 paper filter that will only last a year or two. YouTube has plenty of helpful videos about how to install a filter on your make and model, and you'll be happy to have a higher quality, reusable filter. ... show more
Reviewed in the United States on February 14, 2017 by Danny Jacobs
Fantastic
Style: Cotton Oil
Great filter. Works extremely well. I purchased it for my aging Subaru Forester and it has given the car new life. Lots of air coming in and plenty of filtration. I would not hesitate to buy one of these for every car I own.
Reviewed in the United States on January 24, 2024 by Ambrose
This filter really rocks!!
Style: Cotton Oil
I bought the K&N air filter for my 2016 Subaru Outback with 2.5i engine and installed it on 7-21-2016. It fits perfectly- as mentioned by others the only way it fits in this car's air box is to turn the filter 90 degrees so the filter slats are running vertically, not horizontally as it does on the OEM filter. The filter looks square but is not a perfect square. Build quality is much better and more solid than the flimsy OEM or aftermarket paper air filters. The deep side of the filter (air input) faces the front of the car which I installed into the front portion of the air box. I noticed right away that throttle response was better and much more immediate, and the engine sounds and runs more smoothly. After 2 weeks of having it installed acceleration and power have really improved. The lackluster acceleration was a drawback I've had with this car in exchange for good fuel economy, but I love everything else about it. After having had the K&N filter installed for 2 weeks acceleration has really improved to where I am very impressed and am having even more fun driving it. This is my fifth Subaru with the 2.5i engine. I was thinking my next Subaru would be with the 6 cylinder but no longer, thanks to this air filter. Apparently the engine computer system needs time to adjust to the increased air flow. This is not imagined on my part, power and speed have considerably improved, as well as smoother acceleration. Feels like power has increased by several horsepower. The car also idles at a lower RPM. I have not yet determined any increase in fuel economy- I've been having too much fun driving this car faster and harder than before. This filter really does great things for my car's performance! Don't hesitate to try it. ... show more
Reviewed in the United States on August 3, 2016 by GARY55
K&N quality
Style: Cotton Oil
Perfect fit for my 2010 Subaru Impreza. Noticeably increase in performance
Reviewed in the United States on January 31, 2025 by Winston Blackman
It's a k&n. It's good enough for a title
Style: Cotton Oil
Easy to use. Easy to clean, easy to reuse. In some cases there is a noticeable bit of power difference because of the air to fuel ratio. In some cases you might not notice it. It's not a huge jump in power but it can be noticeable in the right vehicle. I put them in everything. I got one in my outback. I had one in my RX. I had one in my Sequoia had one in my fusion. Every vehicle I've had I've put one in. I have not put one in my lx470 yet because it's going to need much more work than an air filter can do right now. So I haven't put that expense into it. But I will because I know how it performed in the Sequoia with the same engine. It was a noticeable difference and when you're at about 6,000 7,000 lb of weight, a noticeable difference can be significant matter how small of a difference it is that it's noticeable ... show more
Reviewed in the United States on September 16, 2024 by JON
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