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K&N 33-2304 Air Filter

Replacement Filters > Replacement Air Filter
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   4.9 out of 5 stars   114 Customer Reviews
  • 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®
The K&N 33-2304 Air Filter fits some Chrysler 300C, Lancia Thema, Subaru B9 Tribeca, Subaru Forester, Subaru Forester Turbo, Subaru Impreza, Subaru Impreza WRX, Subaru Impreza WRX STi, Subaru Legacy, Subaru Legacy GT, Subaru Legacy IV, Subaru Levorg, Subaru Outback, Subaru Outback XT, Subaru Tribeca, Subaru WRX, Subaru WRX STI, Subaru XV, and Subaru XV Crosstrek models. See vehicle applications link for details.
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 the majority of vehicles 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]

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)

K&N 33-2304 Air Filter Product Reviews

Friday, January 6, 2017 - Part 33-2304
To early to tell if the claims of increased HP and mileage are accurate. Have a K&N filter in my 2003 Honda Pilot with 223,000 on vehicle. Put in at 197k and gas mileage is 18+ . 21 highway.

Karl Rentzheimer
Laurys Station, Pennsylvania
Monday, December 26, 2016 - Part 33-2304
Easy installation. Great product.

Joseph Boyle
Goshen, Arizona
Monday, December 12, 2016 - Part 33-2304
Received my filter very quickly and installed it the first chance I got. I now have K&N filters in my Honda S2000, my Saab 9.3 turbo convertible and now my Subaru Legacy 3.6R.

Samuel Sasson
Ocean, New Jersey
Tuesday, December 6, 2016 - Part 33-2304
I bought this filter online as there was a rebate available if purchased online. I had used K&N filters with my 2011 Sonata and I felt it incresed power and mileage. So far, I have noticed more power, but will wait until better weather to determine if I will get better gas mileage.

Leslie Heintz
Fountainville, Pennsylvania
Monday, November 28, 2016 - Part 33-2304
This is a great product. I noticed more pick up immediately. This is well worth the price. It will last 100,000 miles with a couple of cleanings. Can't beat it. I own a 2016 Subaru Crosstrek 2.0L, AWD.

Michael Green
Aurora, Colorado
Tuesday, November 15, 2016 - Part 33-2304
I bought this air filter for my 2010 Subaru Forester. I have used K&N filters since 1978, when I installed them on my 1958 Volkswagen Bug with dual Weber carburetors. I also use K&N filters on my 1996 Nissan Sentra, and my 1988 Yamaha FZR400. Absolutely the best!

Tani Barbour
Vista, California
Wednesday, November 9, 2016 - Part 33-2304
Great product, great service.

Terry Larson
Venice, Florida