K&N/Custom air filter

Not Vehicle Specific
Part Number: E-3977XD
Features & Benefits

K&N XD air filters use a Deep Pile Design, Extra Fine Weave Grade Cotton and alternate geometries for added efficiency and capacity for off-road conditions. This extra thick filtering medium provides the increased protection demanded by high dust conditions while continuing to provide the performance necessary to stay in the front of the pack. The XD Cotton medium was developed for the extreme conditions encountered by race teams in the Baja 1000. This real world testing is combined with testing performed at K&N s own Dust Retention Laboratory in conformity with the ISO 5011 test protocol. XD Cotton Air filters can be cleaned in the same way as K&N s original cotton air filters.

  • Outstanding protection in harsh dusty conditions
  • Washable and reusable
  • Long service life
  • Low restriction
Product Details
Part Number: E-3977XD
Weight: 5.85 lbs
Shape: Round Straight
Size: 4 to 4.99 in. Overall Height
Air Filter Flange: Not a Flanged Filter
Air Filter Frame Design: Flexible
Air Filter Inside Diameter (in): 13
Air Filter Material: Cotton Gauze
Air Filter Oil Included: Air Filter Pre-Oiled
Air Filter Outside Diameter (in): 16
Air Filter Overall Height (in): 4
Air Filter Pre-Screened: Yes
Air Filter Shape: Round Air Filter
Item Grade: High Performance
Package Contents: 1 Air Filter
Package Quantity: 1
Washable Filter: Yes
Shipping Information: Overnight and Two Day shipping are not available for PO Box, APO/FPO/DPO or US Territory addresses.
This product may be shipped directly by the vendor to any eligible US addresses, excluding APO/FPO/DPO or US Territory addresses.
  • Overall

    K&N/Custom air filter


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