K&N Products RK Series Large Capacity Air Filter w/ Spacers For (Kit40-3909) - Harley Davidson Twin Cam Engines w/o ETC ('99-'11)

K&N Products RK Series Large Capacity Air Filter w/ Spacers For (Kit40-3909) - Harley Davidson Twin Cam Engines w/o ETC ('99-'11)
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Part Number: KN-RK-3911
MSRP: 141.95
Price: $120.99  
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NOTE: For Kit#40-3909

Fits Harley Davidson Twin Cam engines without Electronic Throttle Controls 1999-2011
Excludes 2008-2011 FLH/FLT and Twin Cam engines with Magnetti-Morelli fuel injection system

  • Large Capacity Filter Element for KN-RK-3909 (Includes Longer Spacers)
  • Developed around an original K&N® High-Flow air filter
  • Available in 2 sizes
  • This complete assembly provides a significant increase in airflow to the engine while boosting performance and filtration
  • Powder-coated aluminum backing plate provides solid mounting surface
  • Dyno-tuned velocity stack optimizes airflow to engine
  • Internal breathers attach to backing plate requiring no external breathers
  • Laser-etched K&N® beauty ring attaches to O.E.M. air cleaner cover maintaining factory appearance
  • Air cleaner cover not included
Important: SEE FITMENT DETAILS!


View installation guide

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This accessory fits:

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Important Fitment Details:
 NOTE: For Kit#40-3909

Fits Harley Davidson Twin Cam engines without Electronic Throttle Controls 1999-2011
Excludes 2008-2011 FLH/FLT and Twin Cam engines with Magnetti-Morelli fuel injection system


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