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In the early 1960s, two motorcycle racers, Ken Johnson and Norm McDonald (K&N) developed a ground-breaking new idea for an air filter. After experimenting with numerous types of filter media, they discovered that an oiled cotton design allowed the filter to not only capture contaminants very efficiently, but also allowed it to be washed and reused, and the original K&N High-Flow Air Filter was born. Five decades later, K&N is still innovating industry-leading filtration technology. In addition to performance air filters, K&N® now manufactures a variety of other protection and performance products, including air intake systems, oil filters & fuel filters, with a reputation for exceptional quality and customer service.

The K&N RK-3930 Air Intake System was designed to get more horsepower from your Twin Cam Harley-Davidson engine. Built around the legendary K&N High-Flow Air Filter, this RK Series assembly includes an innovative powder-coated billet aluminium backplate that eliminates external breathers and features a built-in, dyno-tuned velocity stack. The result is a significant airflow increase to the engine without sacrificing filtration. This RK Series assembly retains a factory appearance by utilizing the stock air cleaner cover.

Features

  • Increases horsepower
  • Washable and reusable
  • Fits inside stock cover
  • Provides increased airflow

Specifications

  • Estimated Horsepower Gain: 8.43 HP @ 3700 RPM
  • Replacement Filter: E-3972
  • Air Filter Material: Cotton Gauze
  • Size: 9 Inch
  • Inlet Diameter: 2.469 in (63 mm)
  • Overall Height: 1.875 in (48 mm)
  • Weight: 3.5 lb (1.6 kg)
  • Neck Flange: 2.469 in (63 mm)
  • Mounting Hardware Included: Yes

2007 Harley Davidson FLHTC 1584 Electra Glide Classic
2008 Harley Davidson FLHR Road King
2008 Harley Davidson FLHRC 1584 Road King Classic
2008 Harley Davidson FLHT Electra Glide Standard
2008 Harley Davidson FLHTC 1584 Electra Glide Classic
2008 Harley Davidson FLHTCU Electra Glide Ultra Classic
2008 Harley Davidson FLHTCUSE 1584 Ultra Electra Glide S-Eagle
2008 Harley Davidson FLHX Street Glide
2008 Harley Davidson FLTR 1584 Road Glide
2009 Harley Davidson FLHR Road King
2009 Harley Davidson FLHRC 1584 Road King Classic
2009 Harley Davidson FLHT Electra Glide Standard
2009 Harley Davidson FLHTC 1584 Electra Glide Classic
2009 Harley Davidson FLHTCU Electra Glide Ultra Classic
2009 Harley Davidson FLHTCUSE 1584 Ultra Electra Glide S-Eagle
2009 Harley Davidson FLHX Street Glide
2009 Harley Davidson FLTR 1584 Road Glide
2010 Harley Davidson FLHR Road King
2010 Harley Davidson FLHRC Road King Classic
2010 Harley Davidson FLHT Electra Glide Standard
2010 Harley Davidson FLHTCU Electra Glide Ultra Classic
2010 Harley Davidson FLHX Street Glide
2010 Harley Davidson FLTRX Road Glide Custom
2011 Harley Davidson FLHR Road King
2011 Harley Davidson FLHRC Road King Classic
2011 Harley Davidson FLHTCU Electra Glide Ultra Classic
2011 Harley Davidson FLHTCUSE 1803 CVO Ultra Classic Electra Glide
2011 Harley Davidson FLHTCUTG Tri Glide Ultra Classic
2011 Harley Davidson FLHTK Electra Glide Ultra Limited
2011 Harley Davidson FLHX Street Glide
2011 Harley Davidson FLTR 1803 CVO Road Glide Custom
2011 Harley Davidson FLTRU 1690 Road Glide Ultra
2011 Harley Davidson FLTRX Road Glide Custom
2012 Harley Davidson FLHR Road King
2012 Harley Davidson FLHRC Road King Classic
2012 Harley Davidson FLHTC 1690 Electra Glide Classic
2012 Harley Davidson FLHTCU Electra Glide Ultra Classic
2012 Harley Davidson FLHTCUTG Tri Glide Ultra Classic
2012 Harley Davidson FLHTK Electra Glide Ultra Limited
2012 Harley Davidson FLHX Street Glide
2012 Harley Davidson FLTRU 1690 Road Glide Ultra
2012 Harley Davidson FLTRX Road Glide Custom
2013 Harley Davidson FLHR Road King
2013 Harley Davidson FLHRC Road King Classic
2013 Harley Davidson FLHTCU 1690 Ultra Classic Electra Glide LTD
2013 Harley Davidson FLHTCUTG Tri Glide Ultra Classic
2013 Harley Davidson FLHTK Electra Glide Ultra Limited
2013 Harley Davidson FLHX Street Glide

K&N CUSTOM ASSY KRK-3930

by K&N
SKU: KNRK3930
Regular price $431.99 $410.00 Save 5%
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In the early 1960s, two motorcycle racers, Ken Johnson and Norm McDonald (K&N) developed a ground-breaking new idea for an air filter. After experimenting with numerous types of filter media, they discovered that an oiled cotton design allowed the filter to not only capture contaminants very efficiently, but also allowed it to be washed and reused, and the original K&N High-Flow Air Filter was born. Five decades later, K&N is still innovating industry-leading filtration technology. In addition to performance air filters, K&N® now manufactures a variety of other protection and performance products, including air intake systems, oil filters & fuel filters, with a reputation for exceptional quality and customer service.

The K&N RK-3930 Air Intake System was designed to get more horsepower from your Twin Cam Harley-Davidson engine. Built around the legendary K&N High-Flow Air Filter, this RK Series assembly includes an innovative powder-coated billet aluminium backplate that eliminates external breathers and features a built-in, dyno-tuned velocity stack. The result is a significant airflow increase to the engine without sacrificing filtration. This RK Series assembly retains a factory appearance by utilizing the stock air cleaner cover.

Features

  • Increases horsepower
  • Washable and reusable
  • Fits inside stock cover
  • Provides increased airflow

Specifications

  • Estimated Horsepower Gain: 8.43 HP @ 3700 RPM
  • Replacement Filter: E-3972
  • Air Filter Material: Cotton Gauze
  • Size: 9 Inch
  • Inlet Diameter: 2.469 in (63 mm)
  • Overall Height: 1.875 in (48 mm)
  • Weight: 3.5 lb (1.6 kg)
  • Neck Flange: 2.469 in (63 mm)
  • Mounting Hardware Included: Yes

2007 Harley Davidson FLHTC 1584 Electra Glide Classic
2008 Harley Davidson FLHR Road King
2008 Harley Davidson FLHRC 1584 Road King Classic
2008 Harley Davidson FLHT Electra Glide Standard
2008 Harley Davidson FLHTC 1584 Electra Glide Classic
2008 Harley Davidson FLHTCU Electra Glide Ultra Classic
2008 Harley Davidson FLHTCUSE 1584 Ultra Electra Glide S-Eagle
2008 Harley Davidson FLHX Street Glide
2008 Harley Davidson FLTR 1584 Road Glide
2009 Harley Davidson FLHR Road King
2009 Harley Davidson FLHRC 1584 Road King Classic
2009 Harley Davidson FLHT Electra Glide Standard
2009 Harley Davidson FLHTC 1584 Electra Glide Classic
2009 Harley Davidson FLHTCU Electra Glide Ultra Classic
2009 Harley Davidson FLHTCUSE 1584 Ultra Electra Glide S-Eagle
2009 Harley Davidson FLHX Street Glide
2009 Harley Davidson FLTR 1584 Road Glide
2010 Harley Davidson FLHR Road King
2010 Harley Davidson FLHRC Road King Classic
2010 Harley Davidson FLHT Electra Glide Standard
2010 Harley Davidson FLHTCU Electra Glide Ultra Classic
2010 Harley Davidson FLHX Street Glide
2010 Harley Davidson FLTRX Road Glide Custom
2011 Harley Davidson FLHR Road King
2011 Harley Davidson FLHRC Road King Classic
2011 Harley Davidson FLHTCU Electra Glide Ultra Classic
2011 Harley Davidson FLHTCUSE 1803 CVO Ultra Classic Electra Glide
2011 Harley Davidson FLHTCUTG Tri Glide Ultra Classic
2011 Harley Davidson FLHTK Electra Glide Ultra Limited
2011 Harley Davidson FLHX Street Glide
2011 Harley Davidson FLTR 1803 CVO Road Glide Custom
2011 Harley Davidson FLTRU 1690 Road Glide Ultra
2011 Harley Davidson FLTRX Road Glide Custom
2012 Harley Davidson FLHR Road King
2012 Harley Davidson FLHRC Road King Classic
2012 Harley Davidson FLHTC 1690 Electra Glide Classic
2012 Harley Davidson FLHTCU Electra Glide Ultra Classic
2012 Harley Davidson FLHTCUTG Tri Glide Ultra Classic
2012 Harley Davidson FLHTK Electra Glide Ultra Limited
2012 Harley Davidson FLHX Street Glide
2012 Harley Davidson FLTRU 1690 Road Glide Ultra
2012 Harley Davidson FLTRX Road Glide Custom
2013 Harley Davidson FLHR Road King
2013 Harley Davidson FLHRC Road King Classic
2013 Harley Davidson FLHTCU 1690 Ultra Classic Electra Glide LTD
2013 Harley Davidson FLHTCUTG Tri Glide Ultra Classic
2013 Harley Davidson FLHTK Electra Glide Ultra Limited
2013 Harley Davidson FLHX Street Glide