K&N 33-2478

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   10 Customer Reviews
List Price: $83.70
Your Price: USD $53.99

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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 Amount1.3 oz (39 ml)
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)

Product Reviews

See all reviews!
Review part 33-2478
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, CA
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.

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
Monday, May 12, 2014 - Part 33-2478
Love it. I can see an increase in gas mileage. I'm hooked.

Old River, Texas
Tuesday, November 19, 2013 - Part 33-2478
Use the K&N filters in all our cars. Don't have to worry about changing it all the time.

Art Dake
West Seneca, New York
Wednesday, November 06, 2013 - Part 33-2478
I have been using K&N filters for over 20 years and have always been completely satisfied.  

John P. Jones
Greenville, Texas