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K&N 33-2304 Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5 4.9 out of 5 stars 37 Customer Reviews
Replacement Filters > Replacement Air Filter

List Price: $74.69
Your Price: USD $50.99

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K&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. We make 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. See applicable instruction sheet for details. Our stock replacement air filters for street vehicles are covered by our famous K&N Million-Mile Limited Warranty™ and will be THE LAST AIR FILTER YOUR VEHICLE WILL EVER NEED.

[More Information on K&N Replacement Air Filters]
  • Designed to boost horsepower 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 vehicle warranty
  • Million Mile Limited Warranty®

Product Specifications

Air Filter ShapePanel
Filter MaterialCotton Gauze
Filter Re-Oiling Amount1.06 oz (31 ml)
Height0.938 in (24 mm)
Outside Length8.75 in (222 mm)
Outside Width8.563 in (217 mm)
Package Contents1 Air Filter
Package Quantity1
Product Box Height11.56 in (294 mm)
Product Box Length10.44 in (265 mm)
Product Box Width1.75 in (44 mm)
Product StylePanel Air Filter
Weight0.9 lb (0.4 kg)

Product Reviews

John Salisbury South Daytona Florida
  I feel a noticeable difference in acceleration. Looking forward to the lifespan with the ability to clean and continue to use the K&N filter.
Marvin Mayer Tallahassee, Florida
  I do a 200 mile round trip several times a month, prior to installing a K&N air filter I was getting 28 MPG consistently (I keep ongoing records). After I installed a K&N, I now get 32.5 MPG. Aside from the gain in mileage gain, my Outback runs & performs noticeable better. Thank you for delivering a product that performs better than advertised. 2014 Subaru Outback 2.5 engine.
Ron Yaw Bozeman, Montana
  I have been using K&N air filter on My wife's 2010 Subaru Outback. It works great and saves me money At the car Dealer servicing.
Robert Farley Bellmore,NY
  The K&N air filter for my car was easy find on the website, and replaced the old air filter perfectly. The air filter was delivered as promised, the web site was easy to use, a great experience. I use K&N air filters in all my vehicles.
Mick Wagner Colorado Springs
  Great, I love my filter it came fast no premature A+. Would like to have a few more stickers because they don't seem to stick to glass very well.
Dan Arpie New York
  Great air filter. I would only suggest that you add some indicator arrows to the orientation to the inlet or to motor on the base of the filter seal.
Allen Clutter Houston, Texas