$48.99 USD
MSRP $76.19 35.7% Off
Free Ground Shipping!
In Stock & Ready to Ship!
Find a Dealer

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   5.0 out of 5 stars   82 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®
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, June 24, 2016 - Part 33-2304
Great service, quick delivery.

FAO Simon Williams SDS
Midsomer Norton, United Kingdom
Thursday, June 23, 2016 - Part 33-2304
My husband changed this one for me. It took no time at all.

Jennifer Cress
Independence, West Virginia
Wednesday, June 15, 2016 - Part 33-2304
Great product. I have always fitted K&N Filters or induction kits to my vehicles and will continue to.

Jason Lockwood
Byfleet, Surrey, United Kingdom
Wednesday, June 15, 2016 - Part 33-2304
I just dropped a K&N replacement air filter into my 2015 Impreza Sport. As soon as I drove away, I could feel and hear the difference. Haven't calculated any return on gas mileage yet, but the car accelerates smoother, faster, quieter, and has a much deeper engine note. I put a K&N cool air filter in my 2002 Dodge Ram and loved it immediately. I already love driving my Subaru around, now it is even more fun to bang around town in. Now it actually feels like a sport.

Boston, Massachusetts
Monday, June 13, 2016 - Part 33-2304
Easy to fit. Does the job well.

Charles Edward
Glasgow, United Kingdom
Saturday, June 4, 2016 - Part 33-2304
Same good quality, this is probably my 10-15th filter over the years .cars ,trucks and motorcycles.

Ronald G Kline
Plymouth, Indiana
Wednesday, June 1, 2016 - Part 33-2304
Seems to be more acceleration and slightly better gas mileage. Installed filters on a 2001 and 2009 Subaru Foresters. The 2009 shows mpg on the dash display and average mpg. The average is up 2 to 3 mpg on each long trip so far.

Jerry Kalick