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RK-3933X
$255.99 USD
MSRP $447.69 42.8% Off
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K&N RK-3933X Intake System-Harley Davidson

Custom Assemblies > Intake System-Harley Davidson
  • Designed for Harley-Davidson motorcycles
  • Increase horsepower and torque
  • Extra tall air filter design provides even more air flow and longer service intervals than standard RK-series air intakes
  • Easy to install
  • Made in the U.S.A.
  • Backed by K&N Million Mile Limited Warranty
K&N’s Street Metal Series High-Flow Air Intake Systems provide attractive styling, offer increased airflow and deliver more horsepower & torque to your Harley-Davidson motorcycle. This series completely eliminates the stock OE air cleaner and replaces it with a high-flow K&N air intake system, increasing power. This intake system uses an extra tall K&N air filter, which means even more air flow and longer service intervals than standard RK-series air intake filters. Larger or custom engine builds most often benefit from higher levels of air flow, so the extra tall filter designs are a perfect choice for more powerful bikes. The K&N high-flow air filter is washable, reusable, pre-oiled and ready for installation, making an already easy install even faster. Just how fast? Less than 90 minutes, in most cases. The sturdy, custom aluminum backing plate mounts directly to the throttle body via an aluminum integrated, internal-run breather system. A durable mounting gasket is also included to help absorb vibration. The round custom chrome cover makes this air intake shine above the others.

[RK Series Street Metal High Flow Air Intakes for Harley-Davidson Motorcycles]

Product Specifications

Estimated Horsepower Gain6.5 HP @ 4650 RPM
Replacement FilterE-3984
Air Filter ColorRed
Air Filter MaterialCotton Gauze
Warranty1,000,000 Miles/10 Year
Product StyleMotorcycle Intake System
Air Filter Height3.125 in (79 mm)
CARB EO NumberD-269-59
Street Legal In All US StatesSee Application Link Above
TUV Approved (Europe)No
Overall Height6 in (152 mm)
Top MaterialAluminum
Weight4.5 lb (2 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-3933X Intake System-Harley Davidson Product Reviews