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Replacement Filters > Custom Air Filter

 List Price: $84.32
Your Price: $56.99

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E-3720
 
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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®
Available Information
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E-3720 Vehicle Applications


Part E-3720 Product Specifications
Product Style: Round Air Filter
Height: 2.75 in (70 mm)
Inner Wire: No
Inside Diameter: 11.75 in (298 mm)
Outside Diameter: 13.5 in (343 mm)
Top Style: Open
Top Material/Finish: None
Air Filter Shape: Round
Filter Material: Cotton Gauze
Flanges: None
Package Contents: 1 Air Filter
Package Quantity: 1
Filter Re-Oiling Amount: 1.46 oz (43 ml)
Weight: 2 lb (0.9 kg)
Product Box Length: 14.13 in (359 mm)
Product Box Width: 4.38 in (111 mm)
Product Box Height: 14.25 in (362 mm)



Customer Feedback      Be the first to review part E-3720

Recently fitted one of your air filters to my Nissan GU Patrol, an immediate and notable difference was realized, a lot less pedal to get the vehicle moving and keep it moving, better power and economy, will pay for itself in no time, great product K&N.
Steve Haynes, Australia
Purchased a new K&N replacement filter for my 2013 Ram 1500 quad cab. I've used them in my 2007 Nissan Titan, 2006 Toyota Solara, 2001 Lincoln Continental and my 1999 Honda civic. It's a top quality, must have product. It possibly saves a few MPG's per tank and each vehicle seems to breathe better. It also saves money buy purchasing an $11 recharge kit rather than buying a new air filter every few thousand miles and it's backed by the best warranty in the industry. I am 100% pleased and will continue to purchase this item for every vehicle I acquire in the future.
Matt, Clarksville, Tennessee
I have used your drop-in air filters on several vehicles of my own and have recommended them to my friends. I have found that mileage increases about 10%, and performance increase is noticeable when I floor the cars. I usually drive 4-cyl cars on the freeways, so I need all the help I can get. I had a K&N air filter on my old 1994 Nissan pickup with the 2.4 engine and 250k miles. It still did quite well on I-5. I gave it to my son. I recently was given a 1992 Nissan pickup, same engine with only 115k miles on it. I replaced the oxy sensor, the plugs, etc. It had a newish regular paper air filter in it when I got the truck. I noticed that my sons pickup had more get-up and go than mine did. So I repossessed the slightly dirty K&N filter from my son and installed it in my truck. Oh-wow. Now my truck has the get-up-and-go. My son has the paper air filter in it now. I am waiting for my son to say that there is something wrong with his truck. The only difference in get-up-and go is the K&N air filter. Thanks for making a great product!
John, Portland, Oregon