K&N 33-2304

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   48 Customer Reviews
List Price: $74.69
Your Price: USD $47.99

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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

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Review part 33-2304
Monday, November 23, 2015 - Part 33-2304
Arrived promptly, installed easily, so far so good. Haven't had it in long enough to gauge any improved gas mileage yet and it just started snowing around here so it's difficult to assess performance either as I tend to be a bit more light-footed when the roads might be slick.

Detroit, Mighican
Wednesday, November 04, 2015 - Part 33-2304
So far, I'm very pleased. I'm getting about 10-12 better milage around town. This is from the readout on the dash, not my calculations. This is on a 2014 Subaru Crosstrek. I was getting about 26.3 average, now 29.1 mpg.

Richard Tatoyan
Modesto, CA
Thursday, October 29, 2015 - Part 33-2304
I use K and N filters in everything I own

Altadena California
Monday, October 19, 2015 - Part 33-2304
Top of the line, It does everything you said it would. Also mileage has increased by 2 mpg.

Stuart Busby
Burney, California
Monday, October 12, 2015 - Part 33-2304
Fast accurate fulfillment of my order. Thanks

Bruce Clardy
Monday, October 05, 2015 - Part 33-2304
I replaced the OEM air filter in our 2013 Subaru Crosstrek XV with the K&N 33-2304 replacement filter. The K&N filter was a perfect fit and took only minutes to install. I have K&N filters installed on all my vehicles. We do a lot of off-highway driving, which requires cleaning the air filter at more than normal intervals. K&N filters are simple to clean and maintain and don't require any special skills to do the job. I highly recommend K&N filters for any kind of vehicle, whether for on or off-highway.

Mike D
Corona, CA
Tuesday, September 01, 2015 - Part 33-2304
Really easy replacement and already enjoying a llittle better fuel economy :) Ordering and receiving was GREAT.