SEARCH BY VEHICLE
33-2478
$54.99 USD
MSRP $85.39 35.6% Off
Free Ground Shipping!
In Stock & Ready to Ship!
Find a Dealer

K&N 33-2478 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   13 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 Amount1.3 oz (39 ml)
FlangesNone
Height1 in (25 mm)
Outside Length11.438 in (291 mm)
Outside Width11.375 in (289 mm)
Package Contents1 Air Filter
Package Quantity1
Product Box Height14 in (356 mm)
Product Box Length12.25 in (311 mm)
Product Box Width1.75 in (44 mm)
Product StyleUnique Air Filters
Weight1.6 lb (0.7 kg)

K&N 33-2478 Air Filter Product Reviews

Wednesday, March 16, 2016 - Part 33-2478
I love these filters. Always the perfect fit & they work great! I'll never spend money on any other brand.

Rachel
Cleveland, Ohio
Monday, March 14, 2016 - Part 33-2478
This is my 3rd air filter and love the fact I can go 50,000 miles or better without even checking my air filter. I've never had to even clean one yet, I don't know how they do, it but getting 50-60 or even 70k miles without worrying about my air filter and my cars performance is just peace of mind.

Mike
Minnesota
Monday, December 14, 2015 - Part 33-2478
The air filter was easy to install on my 2013 Nissan Altima. It seems that I am getting an additional mile per gallon since it was installed. So far, I am very pleased with K&N air filters.

Ryan
Ohio
Thursday, November 12, 2015 - Part 33-2478
I bought these two air filters for my 2013 Nissan Altima. I have always used K&N air filters in all of my vehicles. I clean them and reuse them. They are by far the best air filters I have used.

Mark Whipple
Fresno, California
Friday, May 15, 2015 - Part 33-2478
Fit right in. Took seconds to install. I have noticed an increase in gas mileage. Would definitely recommend this product. I own a 2014 and will never buy another filter.

Kevin
Florida
Wednesday, March 11, 2015 - Part 33-2478
Excellent fit and my engine is running smoother. While I haven't been able to check my mileage yet, it looks like I should get an extra 30 miles out this fill up.

Ken Grizzell
Reading, Massachusetts
Tuesday, September 02, 2014 - Part 33-2478
So far so good. Thanks!

Robert Nelson
Roy, Washington