Extra Air Filter Available for K&N Motorcycle Air Cleaner Assembly

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K&N has released a new specialty air filter, part E-3972.  The E-3972 is the filter used in K&N’s RK-3930, a high flow air cleaner assembly designed for 2008, 2009, 2010, 2011, 2012 and 2013 Harley Davidson Touring Models with 1584 cc motors.

K&N air filter E-3972 used in K&N's RK 3930 high flow air filter assembly for Harley Davidson Touring models
K&N air filter E-3972 used in K&N's RK-3930 high flow air filter assembly for Harley Davidson Touring models
The E-3972 has a unique shape, is washable, reusable and designed to provide increased airflow while providing excellent engine protection.  It is now available for those with an RK-3930 assembly that want to own a spare filter.  Owning a spare filter allows the user to rotate filters when dirty and to clean the dirty one at their leisure.

2009 Harley Davidson Street Glide
2009 Harley Davidson Street Glide
K&N has designed, manufactured and enhanced high-flow motorcycle air filters since 1969 for the motorcycle enthusiast interested in adding performance.

Find K&N products for your vehicle using the K&N application search then use the K&N dealer search to find a K&N dealer in your part of the world.

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K&N Engineering, Inc., with headquarters in Riverside, California, has been the world's leader in performance filter technology since 1969, serving the needs of the automotive, motorcycle, marine, industrial and military markets. K&N is heavily involved in nearly every form of motorsports from off-road and powersports to drag racing, stock cars and road racing. For more information about K&N Filters, please contact K&N Engineering, Inc., P.O. Box 1329, Riverside, CA 92502-1329, (800) 213-4182 for a dealer near you, (800) 858-3333 for technical service/questions, (951) 826-4001 Fax, e-mail, or visit