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K&N Airforce Foam Pre-Cleaners

K&N Airforce Foam Pre-Cleaners

What is a K&N Airforce Pre-Cleaner®

The K&N Airforce Pre-Cleaner is a specially designed foam filter wrap made to extend the service interval of your K&N Filtercharger when used in very dusty conditions.

Red colored pre-cleaners are made from large, open cell foam that is oiled. They will stop 90% of the dirt, yet only add a 2% restriction to the airflow of the filter. Our red colored Airforce Pre-Cleaners are designed to be cleaned with K&N Cleaner or soap & water then re-oiled with K&N air filter oil. These pre-cleaners are custom made to fit each application, and there are four universal cut-to-fit sizes available.

Gray colored pre-cleaners are made with smaller foam cells that do not use oil.  They are designed to be cleaned with K&N Air Filter Cleaner or soap & water.


Round Airforce PreCleaner Air Filter Wraps

ColorSizeK&N Air Filter SizeK&N Filter Wrap
Red3" I.D. x 2-1/2" HAll 3"O.D. x 2-1/2" H filters25-1480
Red3-3/4" I.D. x 6" HAll 3-1/2 amp; 4"O.D. filters up to 6" long25-1770
Red4-1/2" I.D. x 1-1/2" HRU-0330, RU-0340, RC-0330, RC-034025-0330
Red14" I.D. x 4" HAll 14" O.D. X 4" H filters25-3750
Red14" I.D. x 5" HAll 14" O.D. X 5" H filters25-3760
Red14" I.D. x 6" HAll 14" O.D. X 6" H filters25-3770
Gray14" I.D. x 4" HAll 14" O.D. X 4" H filters25-5500
Gray14" I.D. x 5" HAll 14" O.D. X 5" H filters25-5600
Gray14" I.D. x 6" HAll 14" O.D. X 6" H filters25-5700
Gray16" I.D. x 3" HAll 16" O.D. x 3" H filters25-5200
Gray16" I.D. x 4" HAll 16" O.D. x 4" H filters25-5300
Gray16" I.D. x 5" HAll 16" O.D. x 5" H filters25-5400

Cone Airforce PreCleaner Air Filter Wraps

ColorSizeK&N Air Filter SizeK&N Filter Wrap
Red3.125" I.D., 3" I.D. top, 3.375" HSU-239125-2588
Red6" I.D., 5" I.D. top, 9" HRE-0810,RE-0870,RE-0910,RU-2510,RU-252025-0810
Red6" I.D., 5" I.D. top, 14" HRE-0800,RE-0820,RE-0860,RE-088025-0880
Red7" I.D., 4.5" I.D. top, 4.875" HYA-660125-6601
Gray8" I.D., 6 5/8" I.D. top, 12" HRC-5166,RC-5169,RC-517125-5166

Oval Airforce PreCleaner Air Filter Wraps (Red)

SizeK&N Air Filter SizeK&N Filter Wrap
3-1/4"x4-1/2" I.D., 1-1/2"HAll 3-1/4" x 4-1/2" oval custom air cleaner assemblies 1-1/2" H25-4250
4-1/4"x5-1/2" I.D., 2" HAll 4-1/4" x 5-1/2" oval custom air cleaner assemblies 2" H25-1691
4-1/2"x7" I.D., 3-1/4" HAll 4-1/2" x 7" oval custom air cleaner assemblies 3-1/4" H25-3340
4-1/2"x7" I.D., 6" HAll 4-1/2" x 7" oval custom air cleaner assemblies 6" H25-3346
5-1/2"x9" I.D., 3-1/4" HAll 5-1/2" x 9" oval custom air cleaner assemblies 3-1/4" H25-3460
5-1/2"x9" I.D., 6" HAll 5-1/2" x 9" oval custom air cleaner assemblies 6" H25-3490
9"x20" I.D., 3" HAll 9" x 20" oval custom air cleaner assemblies 3" H25-1963
9"x20" I.D., 4-1/2" HAll 9" x 20" oval custom air cleaner assemblies 4-1/2" H25-1964
9"x20" I.D., 6" HAll 9" x 20" oval custom air cleaner assemblies 6" H25-1966

Universal Airforce PreCleaner Air Filter Wraps (Red)

SizeK&N Air Filter SizeK&N Filter Wrap
7" wide x 48" longCut to fit a variety of applications, secure w/velcro strips (included)25-3900
18" wide x 48" longCut to fit a variety of applications, secure w/velcro strips (included)25-3918
24" wide x 48" longCut to fit a variety of applications, secure w/velcro strips (included)25-3924
30" wide x 48" longCut to fit a variety of applications, secure w/velcro strips (included)25-3930

K&N PreCharger and DryCharger Air Filter Wraps