K&N Engineering

K&N Red Intake System for Harley-Davidson

SKU RK-3909-1

MPN knnRK-3909-1

$314.99 · Available to order

K&N Red Intake System for Harley-Davidson

K&N's RK Series was developed to get more horsepower from your Twin Cam Harley-Davidson engine. Built around the legendary K&N High-Flow Air Filter, the this RK Series assembly includes an innovative powder coated billet aluminum back plate 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. The RK-3910-1 comes with a larger air filter and longer spacers than the RK-3909-1.

Confirmed vehicle fitment
YearsMakeModelSubmodelDrive
2000–2007Harley-DavidsonFXSTD Softail DeuceBase—
2005–2006Harley-DavidsonFLSTNI Softail DeluxeBase—
2008–2011Harley-DavidsonFXCWC Rocker CBase—
2007Harley-DavidsonFLHTCU Electra Glide Ultra ClassicBase—
2001–2003Harley-DavidsonFXDXT Dyna Super Glide T-SportBase—
2000–2009Harley-DavidsonFXSTB Night TrainBase—
2000–2009Harley-DavidsonFXST Softail StandardBase—
2006Harley-DavidsonFLSTI Heritage SoftailBase—
2005–2006Harley-DavidsonFLSTSCI Softail Springer ClassicBase—
2004–2006Harley-DavidsonFXDLI Dyna Low RiderBase—
2004–2005Harley-DavidsonFXDXI Dyna Super Glide SportBase—
1999–2000Harley-DavidsonFXDS-Conv Dyna ConvertibleBase—
1999–2007Harley-DavidsonFLHR Road KingBase—
1999–2007Harley-DavidsonFXD Dyna Super GlideBase—
2007Harley-DavidsonFXDB Street BobBase—
2006Harley-DavidsonFXDI35 Dyna 35th Anniversary Super GlideBase—
2005–2007Harley-DavidsonFLSTSC Softail Springer ClassicBase—
2000–2003Harley-DavidsonFLSTS Heritage SpringerBase—
2001–2003Harley-DavidsonFLSTSI Heritage SpringerBase—
2001–2006Harley-DavidsonFLSTFI Fat BoyBase—
1999–2002Harley-DavidsonFLTR Road GlideBase—
2003–2006Harley-DavidsonFLHRI Road KingBase—
1999–2004Harley-DavidsonFXDX Dyna Super Glide SportBase—
2007Harley-DavidsonFLTR Road GlideBase—
2002–2006Harley-DavidsonFLHRCI Road King ClassicBase—
2002–2006Harley-DavidsonFLHTCUI Electra Glide Ultra ClassicBase—
2000–2012Harley-DavidsonFLSTC Heritage Softail ClassicBase—
1999–2005Harley-DavidsonFLHTC Electra Glide ClassicBase—
2004–2006Harley-DavidsonFXDI Dyna Super GlideBase—
2005Harley-DavidsonFXDC Super Glide CustomBase—
1999–2007Harley-DavidsonFXDWG Dyna Wide GlideBase—
2001–2006Harley-DavidsonFXSTDI Softail DeuceBase—
2006Harley-DavidsonFLHXI Street GlideBase—
2002–2006Harley-DavidsonFLTRI Road GlideBase—
2001–2006Harley-DavidsonFXSTSI Springer SoftailBase—
2007–2010Harley-DavidsonFXSTC Softail CustomBase—
1999–2007Harley-DavidsonFLHT Electra Glide StandardBase—
2007Harley-DavidsonFXDC Super Glide CustomBase—
2001–2006Harley-DavidsonFXSTI Softail StandardBase—
2002–2006Harley-DavidsonFLSTCI Heritage Softail ClassicBase—
2004–2007Harley-DavidsonFLHRS Road King CustomBase—
2004–2006Harley-DavidsonFXDWGI Dyna Wide GlideBase—
2006–2007Harley-DavidsonFLHX Street GlideBase—
2000–2012Harley-DavidsonFLSTF Fat BoyBase—
2005–2006Harley-DavidsonFXDCI Super Glide CustomBase—
2000–2006Harley-DavidsonFXSTS Springer SoftailBase—
2010–2012Harley-DavidsonFLSTFB Fat Boy LoBase—
2001–2006Harley-DavidsonFXSTBI Night TrainBase—
2004–2006Harley-DavidsonFLHRSI Road King CustomBase—
2006Harley-DavidsonFXDBI Street BobBase—
2007Harley-DavidsonFLHTC Electra Glide ClassicBase—
2007Harley-DavidsonFXDL Dyna Low RiderBase—
2006Harley-DavidsonFLST Heritage SoftailBase—
1999–2005Harley-DavidsonFXDL Dyna Low RiderBase—
2008–2009Harley-DavidsonFXCW RockerBase—
2003–2006Harley-DavidsonFLHTI Electra Glide StandardBase—
2005–2012Harley-DavidsonFLSTN Softail DeluxeBase—
2002–2006Harley-DavidsonFLHTCI Electra Glide ClassicBase—
2007Harley-DavidsonFLHRC Road King ClassicBase—
Specifications
CategoryAir Intake Systems
Sub-CategoryCold Air Intakes
UPC024844294135
CARB ApprovedYes
Prop 65 WarningY
Special OrderYes
Weight3.28 lb
Dimensions (L×W×H)11.75 × 9.5 × 4.875 in