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K&N RK-3943 Intake System-Harley Davidson

Custom Assemblies / Intake System-Harley Davidson
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RK-3943
$231.99 USD
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Product Overview

  • 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 for long service interval
  • 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
The K&N RK-3943 Intake System-Harley Davidson fits some Harley Davidson XL1200C Sportster Custom, Harley Davidson XL1200CX Roadster, Harley Davidson XL1200T SuperLow, Harley Davidson XL1200V Seventy-Two, Harley Davidson XL1200X Forty-Eight, Harley Davidson XL883L SuperLow, and Harley Davidson XL883N Iron models. See vehicle applications link for details.
The K&N RK-3943 High-Flow Air Intake System increases engine intake airflow and delivering more horsepower & torque to certain Harley-Davidson XL1200 model motorcycles. The intake system increases 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 via an aluminum integrated, internal-run breather system. The intake system comes with a K&N Air Filter for high air flow and long service intervals. The K&N High-Flow Air Filter is washable, reusable, pre-oiled and ready for installation.

[More Info on RK Series High-Flow Air Intakes For Harley-Davidson® Motorcycles]
Estimated Horsepower Gain6.35 HP @ 5279 RPM
Replacement FilterE-3040
Air Filter ColorRed
Air Filter MaterialCotton Gauze
Warranty1,000,000 Miles/10 Year
Product StyleMotorcycle Intake System
Air Filter Height2.25 in (57 mm)
CARB EO NumberD-269-59
Street Legal In All US StatesSee Application Link Above
TUV Approved (Europe)No
Overall Height2.5 in (64 mm)
Top MaterialNone
Weight3.4 lb (1.6 kg)
Product Box Height4.88 in (124 mm)
Product Box Length11.75 in (298 mm)
Product Box Width9.5 in (241 mm)
Mounting Hardware IncludedYes
Horsepower gains based on similar vehicle dynamometer test. Results will vary.
WARNING: Cancer and reproductive harm--www.P65warnings.ca.gov

K&N RK-3943 Intake System-Harley Davidson Product Reviews

Thursday, September 21, 2017 - Part RK-3943
Nice kit. Not hard to install on my Sportster Roadster. Definitely sounds and goes better. Always have had good luck with K&N products. I recommend the RK-3943.

Bob Koenig
Littleton, Colorado