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The RK-3944 and RK-3944B Intakes Offer Up Power Gains in Harley® Sportsters
The RK-3944 and RK-3944B Intakes Offer Up Power Gains in Harley® Sportsters
Nov 29, 2016
The RK-3944 intake is available in chrome (shown) or black (RK-3944B)
If you’re ready for a bit more ‘sport’ in your Harley-Davidson® Sportster, the K&N RK-3944 Street Metal Series high-flow air intake is an easy choice for bolt on power. The intake comes in two versions, the chrome RK-3944 and the matte black RK-3944B. After you decide which version will best match the looks of your ride, all that’s left is to bolt on the intake and feel the performance.
The horsepower gains are significant whether you ride an 883cc or 1200cc Sportster. K&N’s dynamometer testing has verified an estimated gain of well over 4 horsepower on a 2014 XL883. On a 2009 1200 Sportster, the estimated gain was over 8.5 horsepower with the RK-3944. Of course, horsepower enhancement will vary depending on the individual bike, but those are healthy gains for an affordable and easy to install system. The intake mounts via a custom aluminum backing plate that bolts directly to the throttle body.
The RK-3944 compliments the overall look of any Sportster
Not only are the horsepower gains with the RK-3944 impressive, the torque numbers with the intake in place are higher across the entire RPM range for both tested bikes. Torque increases result in better throttle response and all-important roll-on power. All of the performance increase data aside, what’s important is that your Harley® will be more fun to ride with the RK-3944 allowing it to breathe more freely.
Of course, K&N filters also offer up extremely effective filtration. The oiled, cotton gauze filter media is a proven performer in trapping and holding airborne dirt, dust, and contaminants. The added bonus is that the filter element is fully washable and reusable putting an end to the need for purchasing and trashing countless paper filters. When cleaning is needed, use the K&N 99-5000 filter cleaning kit to conveniently restore air flow efficiency.
Everything that is needed for installation is included in the box
Another accessory product that is an option when using the RK-3944 is the K&N HD-0800DK pre-filter, which adds another layer of protection to the intake. The K&N Drycharger is a silicone treated, polyester wrap that is made to cover K&N air filters. This product is especially useful if you ride in wet conditions, since it limits the amount of water that can get to the air filter element.
If your Harley Sportster is listed below, the RK-3944 or RK-3944B are for you.
2014 HARLEY DAVIDSON XL883N IRON 54 CI - All Models 2014 HARLEY DAVIDSON XL883L SUPERLOW 54 CI - All Models 2013 HARLEY DAVIDSON XL883N IRON 54 CI - All Models 2013 HARLEY DAVIDSON XL883L SUPERLOW 54 CI - All Models 2013 HARLEY DAVIDSON XL1200X FORTY-EIGHT 74 CI - All Models 2013 HARLEY DAVIDSON XL1200V SEVENTY-TWO 74 CI - All Models 2013 HARLEY DAVIDSON XL1200C SPORTSTER CUSTOM 74 CI - All Models 2012 HARLEY DAVIDSON XL883N IRON 54 CI - All Models 2012 HARLEY DAVIDSON XL883L SUPERLOW 54 CI - All Models 2012 HARLEY DAVIDSON XL1200X FORTY-EIGHT 74 CI - All Models 2012 HARLEY DAVIDSON XL1200V SEVENTY-TWO 74 CI - All Models 2012 HARLEY DAVIDSON XL1200N SPORTSTER NIGHTSTER 74 CI - All Models 2012 HARLEY DAVIDSON XL1200C SPORTSTER CUSTOM 74 CI - All Models 2011 HARLEY DAVIDSON XL883N IRON 54 CI - All Models 2011 HARLEY DAVIDSON XL883L SUPERLOW 54 CI - All Models 2011 HARLEY DAVIDSON XL1200X FORTY-EIGHT 74 CI - All Models 2011 HARLEY DAVIDSON XL1200N SPORTSTER NIGHTSTER 74 CI - All Models 2011 HARLEY DAVIDSON XL1200L SPORTSTER LOW 74 CI - All Models 2011 HARLEY DAVIDSON XL1200C SPORTSTER CUSTOM 74 CI - All Models 2010 HARLEY DAVIDSON XL883N IRON 54 CI - All Models 2010 HARLEY DAVIDSON XL883L SPORTSTER LOW 54 CI - All Models 2010 HARLEY DAVIDSON XL1200X FORTY-EIGHT 74 CI - All Models 2010 HARLEY DAVIDSON XL1200N SPORTSTER NIGHTSTER 74 CI - All Models 2010 HARLEY DAVIDSON XL1200L SPORTSTER LOW 74 CI - All Models 2010 HARLEY DAVIDSON XL1200C SPORTSTER CUSTOM 74 CI - All Models 2009 HARLEY DAVIDSON XL883N IRON 54 CI - All Models 2009 HARLEY DAVIDSON XL883L SPORTSTER LOW 54 CI - All Models 2009 HARLEY DAVIDSON XL883C SPORTSTER CUSTOM 54 CI - All Models 2009 HARLEY DAVIDSON XL1200N SPORTSTER NIGHTSTER 74 CI - All Models 2009 HARLEY DAVIDSON XL1200L SPORTSTER LOW 74 CI - All Models 2009 HARLEY DAVIDSON XL1200C SPORTSTER CUSTOM 74 CI - All Models 2008 HARLEY DAVIDSON XL883L SPORTSTER LOW 54 CI - All Models 2008 HARLEY DAVIDSON XL883C SPORTSTER CUSTOM 54 CI - All Models 2008 HARLEY DAVIDSON XL883 SPORTSTER 54 CI - All Models 2008 HARLEY DAVIDSON XL1200R SPORTSTER ROADSTER 74 CI - All Models 2008 HARLEY DAVIDSON XL1200N SPORTSTER NIGHTSTER 74 CI - All Models 2008 HARLEY DAVIDSON XL1200L SPORTSTER LOW 74 CI - All Models 2008 HARLEY DAVIDSON XL1200C SPORTSTER CUSTOM 74 CI - All Models 2007 HARLEY DAVIDSON XL883R SPORTSTER 54 CI - All Models 2007 HARLEY DAVIDSON XL883L SPORTSTER LOW 54 CI - All Models 2007 HARLEY DAVIDSON XL883C SPORTSTER CUSTOM 54 CI - All Models 2007 HARLEY DAVIDSON XL883 SPORTSTER 54 CI - All Models 2007 HARLEY DAVIDSON XL1200R SPORTSTER ROADSTER 74 CI - All Models 2007 HARLEY DAVIDSON XL1200N SPORTSTER NIGHTSTER 74 CI - All Models 2007 HARLEY DAVIDSON XL1200L SPORTSTER LOW 74 CI - All Models 2007 HARLEY DAVIDSON XL1200C SPORTSTER CUSTOM 74 CI - All Models 2006 HARLEY DAVIDSON XL883R SPORTSTER 54 CI - All Models 2006 HARLEY DAVIDSON XL883L SPORTSTER LOW 54 CI - All Models 2006 HARLEY DAVIDSON XL883C SPORTSTER CUSTOM 54 CI - All Models 2006 HARLEY DAVIDSON XL883 SPORTSTER 54 CI - All Models 2006 HARLEY DAVIDSON XL1200R SPORTSTER ROADSTER 74 CI - All Models 2006 HARLEY DAVIDSON XL1200C SPORTSTER CUSTOM 74 CI - All Models 2005 HARLEY DAVIDSON XL883L SPORTSTER LOW 54 CI - All Models 2005 HARLEY DAVIDSON XL883C SPORTSTER CUSTOM 54 CI - All Models 2005 HARLEY DAVIDSON XL1200R SPORTSTER ROADSTER 74 CI - All Models 2005 HARLEY DAVIDSON XL1200C SPORTSTER CUSTOM 74 CI - All Models 2004 HARLEY DAVIDSON XL883C SPORTSTER CUSTOM 54 CI - All Models 2004 HARLEY DAVIDSON XL883 SPORTSTER 54 CI - All Models 2004 HARLEY DAVIDSON XL1200R SPORTSTER ROADSTER 74 CI - All Models 2004 HARLEY DAVIDSON XL1200C SPORTSTER CUSTOM 74 CI - All Models
