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K&N 33-2478 5.0 out of 5 stars 7 Customer Reviews
Replacement Filters > Replacement Air Filter

 List Price: $83.70
Your Price: $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 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 Shape:Panel
Filter Material:Cotton Gauze
Filter Re-Oiling Amount:1.3 oz (39 ml)
Flanges:None
Height:1 in (25 mm)
Outside Length:11.438 in (291 mm)
Outside Width:11.375 in (289 mm)
Package Contents:1 Air Filter
Package Quantity:1
Part Number:33-2478
Product Box Height:14 in (356 mm)
Product Box Length:12.25 in (311 mm)
Product Box Width:1.75 in (44 mm)
Product Style:Unique Air Filters
Weight:1.6 lb (0.7 kg)


Product Reviews      Review part 33-2478

 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
 Great service, great product.  I use K&N filters in all my vehicles (pick up truck, motorcycle and 2 cars)
Greg M, Swannanoa, North Carolina