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K&N

K&N Engine Air Filter: Increase Power & Acceleration, Washable, Replacement Car Air Filter: Compatible 2003-2019 Subaru H4/H6 1.5/2.0/2.5/3.6L (Forester, Legacy, Outback, Impreza, WRX, Levorg),33-2304

    • Based on 2,143 reviews
Condition: New
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$52.56 Why this price?
4th of July Sale · 12% off was $59.99

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Availability: In Stock.
Fulfilled by Amazon
Arrives Thursday, Jul 4
Order within 5 hours and 38 minutes
Available payment plans shown during checkout

Style: Cotton Oil


Features

  • ENGINEERED POWER: State-of-the-art air filter media is designed to increase horsepower and acceleration as well as improve overall engine performance
  • RUGGED CONSTRUCTION: K&N Air Filters are manufactured with durable, premium materials and state-of-the-art construction methods to last a lifetime
  • 4 LAYERS OF PROTECTION: Multiple layers of premium cotton gauze treated with a specially-designed tacking agent work together to create an intricate mesh of engine filter media that is designed to block and trap harmful contaminants
  • CLEAN ONCE EVERY 5 YEARS: Engine air filter only needs cleaning every 75,000 miles under normal highway driving conditions (5 years based on the average miles driven per year of 15,000 miles)
  • ULTIMATE LONGEVITY: No-hassle lifetime limited warranty on stock replacement K&N air filters- limitations apply
  • EASY INSTALLATION: K&N Air Filters are pre-oiled and ready to drop into your factory air box- they are one of the easiest and most cost-effective vehicle upgrades for quick performance gains
  • REDUCES WASTE: Over 200 million disposable air filters and their packaging waste wind up in landfills each year- reusable filters help reduce waste in our landfills
  • MADE IN USA: K&N Air Filters are proudly made in the USA for trusted quality & reliability

Description

Compatible Vehicles: 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; 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; 2013-2016 SUBARU XV Crosstrek; 2011-2015 LANCIA Thema; 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 Cross Reference: AC Delco A3109C; BMC FB56520; Carquest 88914; Carquest DW88914; Carquest R88914; Champ Labs. AD3984; Chrysler 04861688AA; Fram CA9997; Lancia 04861688AA; Luber-Finer AD3984; Mann-Hummel C2201; Mann-Hummel C22029; MicroGard MGA46914; MicroGard MGA49012; Mobil MA3984; Premium Guard PA5592; Purepro A5592; Purolator A35592; Repco RAF285; Ryco A1527; Service Champ AD5592; Simota OSU002; STP SA9997; Subaru 16546AA090; Subaru 16546AA10; Subaru 16546AA10A; Subaru 16546AA120; Subaru 16546AA12A; Subaru 16546AA90; Subaru 46051FG000; Valvoline VA198; Warner WAF3984; Wesfil WA1184; WIX 46914; WIX 49012

Brand: K&N


Product Dimensions: 4.53"L x 4.09"W x 0.67"H


OEM Part Number: 16546AA090, 16546AA10, 16546AA10A, 16546AA120, 16546AA12A, 16546AA90, 46051FG000


Global Trade Identification Number: 62


Shape: Rectangular


Product Grade: ‎Replacement Part


Brand: ‎K&N


Fit Type: ‎Vehicle Specific Fit


Product Dimensions: ‎4.53"L x 4.09"W x 0.67"H


OEM Part Number: ‎16546AA090, 16546AA10, 16546AA10A, 16546AA120, 16546AA12A, 16546AA90, 46051FG000


Global Trade Identification Number: ‎62


Shape: ‎Rectangular


Manufacturer: ‎K&N


UPC: ‎024844111562


Model: ‎33-2304


Item Weight: ‎14.1 ounces


Country of Origin: ‎USA


Item model number: ‎33-2304


Is Discontinued By Manufacturer: ‎No


Exterior: ‎Other


Manufacturer Part Number: ‎33-2304


Date First Available: February 13, 2005


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Jul 4

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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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Perfect fit
Style: Cotton Oil
Perfect fit, easy to install, pre-oiled and works perfectly
Reviewed in the United States on April 13, 2024 by Vincent van der Merwe
    • Way better than the knock off
Style: Dry Synthetic
Quality is unmatched. Little bump in acceleration.
Reviewed in the United States on April 10, 2024 by Adam Putnam
    • K&N is the best
Style: Cotton Oil
Now all my (3) vehicles (F150, Civic, Outback) have K&N engine air filters - tired of messing with paper filters. Next I'll be installing the cabin filters. Been using the K&N in my F150 for a long time - 20+ years. Still looks brand new and believe I've only cleaned it once. Awesome!
Reviewed in the United States on May 17, 2024 by GO
    • Fits grear
Style: Cotton Oil
I ordered this filter for my 2018 forester and I wasn’t sure if it would fit after reading other reviews but after receiving it which was fast it fit in perfectly. I gained a few more horse power and a little better gas mileage.
Reviewed in the United States on March 23, 2024 by Kevin V
    • great buy
Style: Cotton Oil
replaces air filters with a washable 75000 mile filter suppose to be more efficient too- thanks
Reviewed in the United States on June 19, 2024 by Laurie
    • Not too Shabby!
Style: Cotton Oil
Have noticed a cleaner flow after swapping the old Perrin filter. I like the cleaning capabilities, overall a good buy. The K&N air filter is somewhat more complex. The unique design features multiple layers of oiled cotton fabric which captures the airborne dirt particles. These dirt particles cling to the fibers of the filter and actually become part of the filtering media. This process, known as depth loading, allows the K&N air filter to retain significantly more dirt per square inch than a paper filter. The cotton fabric is sandwiched between pleated aluminum screen. Pleating increases surface area which in turn prolongs service intervals. Pleating exposes substantially more surface area compared to a flat element like foam. The dirt particles collected on the surface of a K&N element have little effect on air flow during much of its service life because there are no small holes to clog. Particles are stopped by layers of crisscrossed cotton fibers and held in suspension by the oil. As the filter begins to collect debris, an additional form of filter action begins to take place because air must first pass through the dirt particles trapped on the surface. That means a K&N air filter continues to exhibit high air flow throughout the life of the filter while it is accumulating dirt. At the same time, the air flow for an average paper air filter can decrease dramatically as the paper element gets dirty. So as dirt accumulates, the performance advantages of a K&N air filter can increase! Tests performed by an independent laboratory commonly known as the Frazier permeability test have shown that the Medium used in K&N air filters flows more than 300% more air than paper air filter medium when compared on a square inch per square inch basis. A Square inch comparison is not directly proportional to the increase you can expect from installing a K&N air filter in replacement of a paper air filter due to the effect of such things as filter size, number and depth of pleats. However, you can be assured a K&N air filter will provide dramatically more air flow which can enhance engine performance. ... show more
Reviewed in the United States on March 8, 2016 by ViP_Representative
    • Easy install even for the mechanically-challenged
Style: Cotton Oil
This was recommended by a friend who swears by K&N air filters. Fit my 2008 Subaru Impreza sedan 2.5L. It was fairly easy to install myself (I'm female and not at all mechanically-inclined). This saved me $19 over having the oil change guys do it. But, it didn't come with directions. Instead, K&N gives a "helpful hints" sheet that was only semi-useful since I had no idea what I was doing. Steps: 1) Make sure your car is off for a while so that everything under the hood is cool in temperature. 2) Disconnect the negative terminal using a small wrench. 3) Unplug the fastener from the big tube that holds the plastic pipe by pressing the small tab. 4) Loosen the screw on the ring clamp for that big tube. 5) Flip up the clips on the air filter compartment. 6) Spread apart the compartment holding the air filter. Don't break plastic parts! You may need to remove the filter hood first. 7) Remove the old air filter carefully. Note which direction it was facing as you pulled it up out of the car, as you'll need to install this K&N the same way. 8) Match up the K&N filter to the old filter to make sure it's the same exact size. K&N is more wide than tall. For my vehicle, this meant turning the K&N filter so that the lines were perpendicular to the old filter. 9) Install the K&N filter by sliding it in the same direction and making sure all four corners go inside the frame. 10) Press the compartment together (it should fit snugly). 11) Re-fasten the clips on the air filter compartment. 12) Re-tighten the screw on the clamp. 13) Re-plug in the connector on the big plastic tube thing. 14) Re-connect the negative battery terminal exactly how you disconnected it before. 15) If you took out the filter hood, re-attach that. 16) Re-check that you did everything. 17) Voila! ... show more
Reviewed in the United States on April 13, 2015 by SK
    • Works great
Style: Cotton Oil
love the extra punch in acceleration, plus gives the engine a nice growl, make sure to buy a recharge kit when it's on sale for when you need it
Reviewed in the United States on March 9, 2024 by David A.

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