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K&N

K&N Engine Air Filter: Long Life 18,000 Mile Replacement Air Filter: Compatible with 2003-2019 Subaru H4/H6 1.5/2.0/2.5/3.6L (Forester, Legacy, Outback, Impreza, WRX, Levorg, Crosstrek), KNA-2304

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Availability: In Stock.
Fulfilled by Amazon
Arrives Tuesday, Jun 2
Order within 6 hours and 54 minutes
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Features

  • RUGGED CONSTRUCTION: K&N Advantage Plus Air Filters are manufactured with durable, premium materials to last for up to 18,000 miles of use.
  • EXTENDED LIFE 18K: K&N Advantage Plus Air Filter provides 50% longer life compared to standard 12,000-mile filters.
  • SUPERIOR FILTRATION & PROTECTION: K&N uses a premium filter media that provides up to 99% efficiency to protect your engine.
  • REPLACE EVERY 18K Miles: Engine air filter only needs to be replaced every 18,000 Miles under normal highway driving conditions (1.5 years based on the average miles driven per year of 12,000 miles)
  • NO-HASSLE WARRANTY: 1-Year Limited Warranty.

Description

K&N Performance Air Filter K&N has been the 1 Brand in Performance Air Filtration since 1969, bringing you the best in performance and protection for whatever you drive. Offering a long-life solution for every driver, K&N’s performance technology is now available in a premium 18,000 Mile filter to provide you extended life compared to traditional 12,000 Mile disposable filters. With a premium synthetic or cellulose blend filter media, based on application, these filters provide up to 99% engine protection for your vehicle. They are designed to meet or exceed OEM specifications and will install easily into your factory air box in minutes. Features:Premium 18,000 Mile filter lifeUp to 99% engine protectionDesigned to meet or exceed OEM specificationsEasy installation in minutesCompatible Vehicles:2006-2007 SUBARU B9 Tribeca2016-2017 SUBARU Crosstrek2004-2019 SUBARU Forester2011-2013 SUBARU Forester Turbo2008-2016 SUBARU Impreza2005-2019 SUBARU Legacy2005-2009 SUBARU Legacy GT2004-2019 SUBARU Outback2008-2014 SUBARU Tribeca2012-2019 SUBARU WRX2013-2015 SUBARU XV Crosstrek2012-2019 SUBARU WRX STI

Product Grade: Replacement Part


Brand: K&N


Fit Type: Vehicle Specific Fit


OEM Part Number: KNA-2304


Manufacturer: K&N Engineering, Inc.


Manufacturer: ‎K&N Engineering, Inc.


Brand: ‎K&N


Model: ‎K&N Advantage Air Filter 18K Miles


Item Weight: ‎9.5 ounces


Item model number: ‎KNA-2304


Exterior: ‎Machined


Manufacturer Part Number: ‎KNA-2304


OEM Part Number: ‎KNA-2304


Date First Available: October 17, 2024


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Jun 2

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Good quality & fair Price
It fits Outback V6 3.6L, and it seems a good quality product. It's worth the price.
Reviewed in the United States on June 27, 2025 by AZA
    • Quality
Perfect fit for my 2019 Sub Outback.
Reviewed in the United States on November 14, 2025 by LookingGood
    • 2005 Subaru
Nice filter, Fit 2005 Subaru. Great value, price
Reviewed in the United States on November 1, 2025 by Robert Meabon
    • Better Performance Than Before
I’m not sure if it’s just me or if it’s real, but I’ve noticed a slight improvement in performance, and the engine seems quieter at a stop than before. I would highly recommend these to anyone.
Reviewed in the United States on December 8, 2025 by Kachua
    • Good product
This is a long life filter without having to oil and wash like a lifetime k&n.
Reviewed in the United States on December 18, 2025 by Michael Mueller
    • K&N engine air filter for 2017 Subaru Outback
I recently bought a slightly used Subaru Outback 2.5i Premium for my mom and after inspecting the engine air filter, I discovered it needed replacement. I’ve been using K&N air filters in my ICE vehicles and this one fit perfectly. The price was good and the delivery service and schedule from Amazon was excellent. The filter is rated for 18k miles and my expectation is that it will perform flawlessly. ... show more
Reviewed in the United States on April 15, 2025 by Charles C. Alleyne
    • Its K&N quality
Good quality filter
Reviewed in the United States on September 30, 2025 by Tony
    • Met the need
Fits well and inexpensive
Reviewed in the United States on August 9, 2025 by Prophessor

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