K&N Products RK Series Air Filter Replacement Element for (Kit40-3910) - Harley Davidson Twin Cam Models w/o ETC (

K&N Products RK Series Air Filter Replacement Element for (Kit40-3910) - Harley Davidson Twin Cam Models w/o ETC (
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Part Number: KN-RK-3912
MSRP: 79.95
Price: $67.99  
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NOTE: For Kit#40-3910

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


  • 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:

- Harley Davidson Dyna Glide
- Harley Davidson Softail
- Harley Davidson Touring/Dresser


Important Fitment Details:
 NOTE: For Kit#40-3910

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




Dyna Low Rider Convertible FXDS : 1994–1998
Dyna Low Rider FXDL : 1993–1998
Dyna Super Glide FXD : 1995–1998
Dyna Wide Glide FXDWG : 1993–1998
Softail Bad Boy FXSTSB : 1995–1997
Softail Custom FXSTC : 1993–1998
Softail Fat Boy FLSTF : 1993–1999
Softail Heritage Classic FLSTC : 1993–1999
Softail Heritage Springer FLSTS : 1997–1999
Softail Night Train FXSTB : 1999
Softail Nostalgia FLSTN : 1993–1996
Softail Springer FXSTS : 1993–1999
Softail Standard FXST : 1999
Sportster 1200 Custom XLH1200C : 1996–2003
Sportster 1200 Custom XLH883C : 2002
Sportster 1200 Sport XLH1200S : 1996–2003
Sportster 1200 Standard XLH1200 : 1993–2003
Sportster 883 Custom XLH883C : 1999–2001, 2003
Sportster 883 Deluxe XLH883 : 1993, 1995
Sportster 883 Hugger XLH883 : 1996–1997, 2000
Sportster 883 Roadster XLH883R : 2003
Sportster 883 Standard XLH883 : 1993–2003
Super Glide 1st Edition FXR2 : 1999
Super Glide 2nd Edition FXR3 : 1999
Super Glide FXR : 1993–1994
Super Glide Low Rider Convertible FXRS : 1993
Super Glide Low Rider FXLR : 1993–1994
Super Glide Low Rider Sport FXRS-SP : 1993
Super Glide Police Model FXRP : 1993–1994
Touring Electra Glide Classic EFI FLHTCI : 1996–1998
Touring Electra Glide Classic FLHTC : 1993–1998
Touring Electra Glide Sport FLHS : 1993
Touring Electra Glide Standard FLHT : 1995–1998
Touring Electra Glide Ultra Classic EFI FLHTCUI : 1995–1998
Touring Electra Glide Ultra Classic FLHTCU : 1993–1997
Touring Electra Glide Ultra Classic FLHTCUI : 1998
Touring Road Glide EFI FLTRI : 1998
Touring Road Glide FLTR : 1998
Touring Road King Classic EFI FLHRCI : 1998
Touring Road King EFI FLHRI : 1996–1998
Touring Road King FLHR : 1994–1998
Touring Tour Glide Ultra Classic EFI FLTCUI : 1996
Touring Tour Glide Ultra Classic FLTCU : 1993–1995



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