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33-2431
$55.99 USD
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K&N 33-2431 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   19 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 Amount1.69 oz (50 ml)
Height1.25 in (32 mm)
Outside Length12.25 in (311 mm)
Outside Width9.625 in (244 mm)
Package Contents1 Air Filter
Package Quantity1
Product Box Height1.69 in (43 mm)
Product Box Length12.5 in (318 mm)
Product Box Width10.38 in (264 mm)
Product StylePanel Air Filter
Weight1.9 lb (0.9 kg)

K&N 33-2431 Air Filter Product Reviews

Monday, August 15, 2016 - Part 33-2431
I've been using it for about 2 months now and it has worked great. It still looks brand new, no bends, still clean.

Bobby Montgomery
Crestwood, Kentucky
Tuesday, May 17, 2016 - Part 33-2431
Thank you K&N! Great products!

Ryan Chaapel
Troy, Pennsylvania
Saturday, February 27, 2016 - Part 33-2431
Good experience from starting the order thru the installation of filter.

Alan Kalina
Nevada
Thursday, January 21, 2016 - Part 33-2431
Easy install, so far so good!

Mark Janosik
St. Louis, Missouri
Wednesday, October 28, 2015 - Part 33-2431
Easy installation. Noticed immediate change in acceleration and performance with better transmission shifts. Great product.

Michael Peterson
Georgia
Thursday, March 12, 2015 - Part 33-2431
Noticed better fuel mileage right away. I have always used K&N and always will.

Allan
Texas
Monday, March 2, 2015 - Part 33-2431
When reading the reviews as applicable to late model Mustangs, many said they observed a noticeable increase in horsepower. Additionally, a slight increase in MPG was noted. I installed this filter on my new 2014 Mustang 3.7L V6. I notice smoother acceleration, but a slight decrease in MPG. I was averaging 15.5-16.5 MPG in the city. Now, I am averaging 14.2-15.5 MPG. I don't think the acceleration improvement has lead to a heavier foot, so the airflow may have decreased. Or, as I might expect, the mass airflow sensor has not adjusted to the change in filter media.

Rick
Arizona