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K&N 33-2478 5.0 out of 5 stars 8 Customer Reviews
Replacement Filters > Replacement Air Filter

List Price: $83.70
Your Price: USD $56.99

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33-2478
 
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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)
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)


Product Reviews


  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
  So far so good. Thanks!
Robert Nelson Roy, Washington
  Love it. I can see an increase in gas mileage. I'm hooked.
Calvin Old River, Texas
  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
  I have been using K&N filters for over 20 years and have always been completely satisfied.  
John P. Jones Greenville, Texas
  This air filter is amazing. I have some noticable power gains and my gas mileage has improved even more so than the listed 38 mpg highway. Installed in about 15 seconds and it was ready to go. On a recent trip to Las Vegas I was able to drive from my home in San Diego to Vegas and back with a quarter tank of gas still in the tank. I will let you do the math on that one, but it is one of the best purchases that I have made for this vehicle.
Diego San Diego, California
  Filter for 2013 Altima arrived quickly and fit perfectly. Both performance and mileage improved.
This is my third K&N filter & have ben satisfied with all of them.

Don Rynbrandt Solon, Ohio