K&N RK Series Street Metal High Flow Air Intakes For Harley-Davidson® Motorcycles

  • Guaranteed Increase in Horsepower
  • Aggressive appearance while providing outstanding airflow
  • Completely replaces stock air cleaner assembly
  • Washable, oversized K&N high flow air filter
  • Provides excellent filtration and long service intervals
  • Aluminum backing plate with integrated velocity stack
  • Built-in breathers replace external OE breathers**
  • High quality mirror finish aluminum cover
  • K&N Drycharger® available for use in extremely dusty conditions
  • Includes K&N Million Mile Limited Warranty®

K&N Harley-Davidson® Air Intake Systems

K&N Million Mile Limited Warranty®

K&N's RK Series Street Metal high flow air intake systems offer increased airflow and deliver more horsepower & torque to your Harley-Davidson® motorcycle. These intake systems increase power by eliminating the stock OE air cleaner and replacing it with a complete high flow air intake system. The sturdy, custom aluminum backing plate mounts directly to the throttle body and has a built in breather system to direct pressure from the breather bolts into the throttle body opening and not out into the air filter. Street Metal air intake systems include a high flow air filter which provids low restriction airflow and long air filter service intervals. K&N Street Metal series high flow air intake systems are equipped with custom designed aluminum covers to make sure your air cleaner looks good while powering down the highway or at your local show.


Flare Style Air Intake RK-3932 for Harley Softail, Dyna & V-Twin F/I Models
Flare Style Air Intake RK-3932 for Select 2008-2013 Softail, 2008-2014 Dyna & 1999-2007 V-Twin F/I Models*

Torch Style Air Intake RK-3939 for Touring Models
Torch Style Air Intake RK-3939 for Select 2008-2013 Touring Models*

Select 2008-2013 Softail, 2008-2014 Dyna & 1999-2007 V-Twin F/I Models* use Torch Style Air Intake RK-3935

Select 1992-1997 Evo 82" Models* use Torch Style Air Intake RK-3902

Select 1991-1997 Sportster 1200 Models* use Torch Style Air Intake RK-3904

Flux Style Air Intake RK-3937 for Touring Models
Flux Style Air Intake RK-3937 for Select 2008-2013 Touring Models*

Select 1992-1997 Evo 82" Models* use Flux Style Air Intake RK-3912

Select 1991-1997 Sportster 1200 Models* use Flux Style Air Intake RK-3914

Hammer Style Air Intake RK-3933 for Softail, Dyna & V-Twin F/I Models
Hammer Style Air Intake RK-3933 for Select 2008-2013 Softail, 2008-2014 Dyna & 1999-2007 V-Twin F/I Models*

Weld Style Air Intake RK-3938 for Harley Touring Models
Weld Style Air Intake RK-3938 for Select 2008-2013 Touring Models*

Select 2008-2013 Softail, 2008-2014 Dyna & 1999-2007 V-Twin F/I Models* use Weld Style Air Intake RK-3934

Select 1992-1997 Evo 82" Models* use Weld Style Air Intake RK-3901

Select 1991-1997 Sportster 1200 Models* use Weld Style Air Intake RK-3903

Grind Style Air Intake RK-3936 for Touring Models
Grind Style Air Intake RK-3936 for Select 2008-2013 Touring Models*

Select 1992-1997 Evo 82" Models* use Grind Style Air Intake RK-3911

Select 1991-1997 Sportster 1200 Models* use Grind Style Air Intake RK-3913

Round Flames Style Air Intake RK-3921 for Harley Touring Models
Round Flames Style Air Intake RK-3921 for Select 1992-1997 Evo 82" Models*

Select 1991-1997 Sportster 1200 Models* use Round Flames Style Air Intake RK-3923

Teardrop Flames Style Air Intake RK-3922 for Harley Touring Models
Teardrop Flames Style Air Intake RK-3922 for Select 1992-1997 Evo 82" Models*

Select 1991-1997 Sportster 1200 Models* use Teardrop Flames Style Air Intake RK-3924


*Some air intakes are not legal for highway use in California or other states adopting California emission standards. Click the part number for up-to-date information on emissions legality for specific parts on specific vehicles. For a list of other CARB adoption states visit the Legal in Most States page.