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E-3971
$57.99 USD
MSRP $78.29 25.9% Off
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K&N E-3971 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 Amount0.5 oz (15 ml)
FlangesNone
Height2.75 in (70 mm)
Inner WireNo
Inside Diameter4.625 in (117 mm)
Outside Diameter6 in (152 mm)
Package Contents1 Air Filter, 1 K&N 1oz Sealing Grease
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
Weight0.7 lb (0.3 kg)

Customer Feedback

I have not had a chance to use this product yet and probably will not until this summer. However I am giving it 4 stars based on looks alone. I have seen the OEM filter for the Indian Scout and it looks very cheap This looks like a much more substantial/quality filter that will do the job much better and last a long time. I expect it will pay for itself in longevity.

Michael Grissom
Racine, 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