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K&N RK Series High-Flow Air Intake For Harley-Davidson® Motorcycles

K&N RK Series High-Flow Air Intake For Harley-Davidson® Motorcycles
  • Guaranteed increase in horsepower
  • Replaces the stock air filter and cleaner backing plate assembly
  • Fits behind the OE air cleaner cover maintaining the factory appearance
  • Washable, oversized K&N high-flow air filter equals longer life
  • Oversized black, powder coated aluminum backing plate provides solid mounting
  • Dyno tuned velocity stack directs airflow to engine
  • Built in breathers replace external OE breathers☨
  • Includes K&N Million Mile Limited Warranty®

K&N Harley-Davidson® RK Series Air Intake Systems

K&N Million Mile Limited Warranty®

K&N's RK Series air intake systems have been developed to get more horsepower from your Harley-Davidson® motorcycle. Built around the legendary K&N high-flow air filter, the 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.

Some of the more popular RK series air intake systems for Harley-Davidson®:
 

Air Intake RK-3930 for Harley Touring Models

Part: Air Intake RK-3930
Fits: Select 2008-2013 Touring Models*
Estimated Horsepower Gain: +8.43HP on 2008 Harley Davidson Road Glide FLTR 1584
Estimated Horsepower Gain: +5.66HP on 2011 Harley Davidson Electra Glide Limited 1584

Air Intake RK-3929 for Harley Sportster Models Part: Air Intake RK-3929
Fits: Select 2004-2014 Sportster Models*
Estimated Horsepower Gain: +4.4HP on 2008 Harley Davidson Sportster Custom 883
Estimated Horsepower Gain: +7.81HP on 2009 Harley Davidson Sportster 1200 Nightster
Air Intake RK-3931 for Harley Dyna Models Part: Air Intake RK-3931
Fits: Select 2008-2016 Sportster Models*
Estimated Horsepower Gain: +6.54HP on 2008 Harley Davidson Dyna Street Bob
Air Intake RK-3909-1 for Harley Touring, Dyna & Softail Models Part: Air Intake RK-3909-1 with 1-5/8" Tall Filter
Fits: Select 1999-2012 Touring, Dyna & 2000-2012 Softail Models*
Estimated Horsepower Gain: +9.59hp on 2010 Harley Davidson Fat Boy 96ci
Estimated Horsepower Gain: +6.05hp on 2006 Harley Davidson Road King 88ci
Air Intake RK-3910-1 for Harley Touring, Dyna & Softail Models Part: Air Intake RK-3910-1 with 2-1/4" Tall Filter
Fits: Select 1999-2012 Touring, Dyna & 2000-2012 Softail Models*
Estimated Horsepower Gain: +10.76hp on 2010 Harley Davidson Fat Boy 96ci

*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.

☨Where Applicable