$48.99 USD
MSRP $75.99 35.5% Off
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K&N E-3679 Air Filter

Replacement Filters > Custom Air Filter
  • 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.

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Available Information

Product Specifications

Air Filter ShapeRound
Filter MaterialCotton Gauze
Filter Re-Oiling Amount1.46 oz (43 ml)
Height3.75 in (95 mm)
Inner WireNo
Inside Diameter8 in (203 mm)
Outside Diameter10 in (254 mm)
Package Contents1 Air Filter
Package Quantity1
Product Box Height10.31 in (262 mm)
Product Box Length10.19 in (259 mm)
Product Box Width3.94 in (100 mm)
Product StyleRound Air Filter
Top Material/FinishNone
Top StyleOpen
Weight1.3 lb (0.6 kg)

Customer Feedback

Be the first to review part E-3679
"This letter is written to you and all the staff there at K&N to thank you for your courteous help in building the cartridge to fit the canister for the air filter on my motorhome which has the 300 hp Cummins engine. We had an opportunity to drive the motorhome during the Thanks-Giving holidays. The trip was approximately 400 miles. The first thing I noticed was the increased performance of the engine. The coach performed better than it ever was, and it was purchased new in March of [1993]. The next thing that caught my eye was the absence of black exhaust smoke upon heavy acceleration. I wish I had checked the mileage, but I do know that the mpg increased dramatically. The next trip was also made towing our 1993 Jeep Grand Cherokee, which is no lightweight. Last week, I immediately ordered a K&N air filter cartridge for both the Jeep Cherokee and our new 1993 GMC truck. That should tell you I am a believer in K&N filters."

Bob and Nancy Spence
Brady, Texas
Been using K&N products for years. Love the performance and sound of the system on my new 2015 GMC truck.

Joe Jennings
Lynchburg, Virginia
I could tell an immediate difference after replacing the stock air filter in my 2011 GMC Sierra with the K&N filter. Engine performance increased dramatically. I am very pleased.

James Davis
Clayton, North Carolina