Air Filter Foam Wrap
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K&N Air Filter Foam Wrap

Part No. 25-3900 Warranty Details  

Fit of this part varies by vehicle & equipment specs Type of Fit

The K&N Airforce Pre-Cleaner is a specially designed foam filter wrap made to extend the service interval of your K&N air filter when used in very dusty conditions. The Airforce Pre-Cleaner is designed to be cleaned with K&N Cleaner or soap & water. Red colored Airforce pre-cleaners air oiled with K&N air filter oil after they are cleaned. They are made from large, open cell foam. Gray colored Airforce pre-cleaners do not use oil. They have smaller foam cells.

Product Features:
  • Extends service interval of your filter in very dusty conditions
  • Large open cell foam construction stops 90% of dirt with very low air restriction
  • Cleanable with K&N Filter Cleaner or soap and water
  • This product wraps your air filter with an additional pre-filter
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by PowerReviews
K&NAir Filter Foam Wrap

(based on 1 review)

Ratings Distribution

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  • 1 Stars



Reviewed by 1 customer

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(9 of 16 customers found this review helpful)




from cleveland, tn

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    • No Fasteners

    Best Uses

      Comments about K&N Air Filter Foam Wrap:

      The item arrived without the attaching strips. It took three calls to get this corrected but I decided to just return to the store. My loss was the shipping charges.

      • Was this a gift?:
      • No

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      2 Questions | 2 Answers
      Displaying questions 1-2
      • Q:

        do you have flat sheets of this material THANK YOU
        Asked on 5/11/2015 by jessie from fremont ne.

        1 answer



          Yes, Jessie, we do have this foam wrap in a flat sheet. The K&N Air Filter Foam Wrap (Part No. 25-3918) will work fine for your project and it comes in the dimension of 48.00 inches in length and 18.00 inches in width.

          Answered on 5/11/2015 by Steve from AAP
      • Q:

        what are the dementions i want to know if it will fit my after market air filter
        Asked on 4/29/2010 by 1988 wrangler from brooklyn ct

        1 answer



          Air Filter Style Rectangular
          Height (in) 7.000 in.
          Length (in) 48.000 in.
          Width (in) 1.000 in.
          Filter Color Red
          Filter Material Foam

          Answered on 4/29/2010 by kevin from AAP
      Displaying questions 1-2

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