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33-2401
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MSRP $76.89 36.3% Off
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K&N 33-2401 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   7 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 33-2401 Air Filter fits some Ford Focus 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 Amount0.88 oz (26 ml)
FlangesNone
Height1 in (25 mm)
Outside Length8.5 in (216 mm)
Outside Width7.813 in (198 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 StyleUnique Air Filters
Weight1 lb (0.4 kg)

K&N 33-2401 Air Filter Product Reviews

Sunday, August 21, 2016 - Part 33-2401
Ordering on line was very easy. Order arrived a day earlier then scheduled. Would order on line again.

Michael Wertz
Leesport, Pennsylvania
Monday, August 1, 2016 - Part 33-2401
I have used K&N replacement air filters In all my vehicles that I have owned and this one, I put into my girlfriends 2011 Ford Focus to help with the amount of airflow into the engine. Along with a change in fuel type, she has Increased her fuel mileage from 33.2 to 37.1. I also bought a replacement filter for my 2015 Chevrolete Silverado 1500 and I changed the exhaust and fuel type and I also have increased my fuel mileage from 14.6 to 17.8 as well as having increased my horse power by 35 with the changes. I very much suggest the K&N replacement air filters whether your just trying to increase your gas mileage or trying to gain some horse power in your vehicle. They are great because you only ever have to buy one and it should last for the life of your vehicle with proper maintenance. Just remember that just changing the air filter may not do what your expecting, there might be something else you might have to do as well to get what you are trying to do.

Keegan Tanner
Burlington Flats, New York
Friday, May 29, 2015 - Part 33-2401
Love my K&N air filter and was worth the money.

Aaron
Oxford, Massachusetts
Monday, May 25, 2015 - Part 33-2401
Great filters , I put them in all my cars, everybody should put K&N filters in their cars.

Terry Gaynor
Mount Prospect, Illinois
Wednesday, April 15, 2015 - Part 33-2401
I would like to think that I'm getting better gas mileage and better performance. It's still in the testing stage.

James Sheldon
Lakeside, California
Monday, April 28, 2014 - Part 33-2401
I have been using your filters for many years. I have never had an issue with one. The first thing I notice is the increased gas mileage. Because I live in the mountains, I also noticed increased power. If you add that to the fact that I don't have to buy another filter I would consider your filters a win win. This time I bought three filters and it dosent' seem to matter what vehicle I put them in I get the same result. Have a nice day.

Issaac Mozingo
Oregon
Monday, December 30, 2013 - Part 33-2401
Superior performance product, my fifth one. Always get more mpg and midrange torque that really works. Ordering direct was very easy and shipping was quick. A K&N fan for life! Stock air:never again!

Wm. Blake Mackan
College Station, Texas