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E-3981
$39.99 USD
MSRP $53.99 25.9% Off
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K&N E-3981 Air Filter

Replacement Filters > Custom Air Filter
  • Designed to provide increased horsepower and acceleration
  • Specifically developed for Off-Road, Motocross, ATVs, UTVs and Side by Sides
  • Pleated cotton media provides a large filtration area offering low restriction, high-capacity and long service intervals
  • Multiple layers of woven cotton gauze media offers excellent filtration
  • Fits directly into OEM air box with application specific sealing bead ensuring a precise fit
  • No fuel management modifications are required to obtain increased performance
  • Washable & reusable, most are pre-oiled and ready to ride!
  • One Year Limited Warranty
K&N off-road replacement air filters are ideal for extended use in dirty and dusty off-road riding and provide clean carburetion even at high altitude. Generally, no jet changes are required with just a K&N filter element. K&N replacement air filters are washable and reusable and provide high air-flow with excellent filtration.

[More Information on Off-Road Motorcycle and ATV Air Filters]

Product Specifications

Air Filter ShapeRound
Filter MaterialCotton Gauze
Filter Re-Oiling Amount0.28 oz (8 ml)
FlangesNone
Height1.625 in (41 mm)
Inner WireNo
Inside Diameter5 in (127 mm)
Outside Diameter6.375 in (162 mm)
Package Contents1 Air Filter
Package Quantity1
Product Box Height3.5 in (89 mm)
Product Box Length6.31 in (160 mm)
Product Box Width6.56 in (167 mm)
Product StyleRound Air Filter
Top Material/FinishNone
Top StyleOpen
Weight0.8 lb (0.4 kg)

Customer Feedback

I was quite surprised how prompt and cordial the company is. Your air-filter for my Indian is performing very well. Could feel the difference immediately. And more than anything, it's still American made with pride. Thank you.

Andrew Labedz
Dale, Wisconsin
Fast delivery and the filter fit perfectly. Thank you K&N for developing this for the new Indian Thunderstroke.

Richard Paulik
Tucson, Arizona
Great product and price. I put this on my Indian Chieftain instead of the $500.00 (Brand Name) reusable filter.

Bob Deavours
Arkansas