K&N 25-3490 | Air Filter Wrap

Part Number
Air Filter Foam Wrap
Special Price $47.59 Regular Price $55.99
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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 are 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.



  • Cleanable With K&N Filter Cleaner or Soap And Water
  • Stops 90 Percent Of Dirt With Very Low Air Restriction
  • The K/N Airforce pre-cleaner is a specially designed foam filter wrap made to extend the service interval of a K/N air filter when used in very dusty conditions. Red colored pre-cleaners are oiled while gray colored pre-chargers are not.
  • Extends Service Interval Of Your Filter
  • Large Open Cell Foam Construction
  • Air Filter Foam Wrap
  • Wraps Your Air Filter With An Additional Pre-Filter
  • Air Filter Foam Wrap


Automotive Item GradeHigh Performance
Closed TopNo
Inside Length9.000 in. (229mm)
Inside Width5.500 in. (140mm)
Item Height6.000 in. (152mm)
Item Weight0.200 lbs. (0.1 kg)
Package Content1
Package Contents1 Airforce Pre-Cleaner Wrap
Package MaterialPlastic Other
Package Quantity1
Package TypeBag
Product Box Height15.500 in. (394mm)
Product Box Length8.500 in. (216mm)
Product Box Width3.000 in. (76mm)
Prop 65 (C, R or CR)CR
Prop 65 Warning Labelhttps://www.knfilters.com/images/l/prop65.jpg
TitleK&N 25-3490 Air Filter Foam Wrap
WARNING CA Proposition 65Yes
WARNING CA Proposition 65 MessageWARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Wrap TypeAirforce Pre-Cleaner


Customer Questions
Can K&N filters get wet?
No, K&N filters should not get wet.
When to clean K&N air filter?
K&N air filters should be cleaned approximately every 50,000 miles (80,000 kilometers) or as recommended by the manufacturer.
Will K&N filter increase mpg?
It is possible for a K&N air filter to slightly improve fuel efficiency (MPG) under certain conditions.
What does K&N mean?
K&N stands for the names of the two founders of the company, Ken Johnson and Norm McDonald.
Please, mind that only logged in users can submit questions

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