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Custom Assemblies > Intake System-Harley Davidson

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RK-3937
 
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K&N’s Street Metal™ Series High-Flow Air Intake Systems provide a good looking appearance, 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 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. A durable mounting gasket is also included to help absorb vibration. The K&N High-Flow Air Filter™ is washable, reusable, pre-oiled and ready for installation. Simple designed custom covers give this air intake good looks while powering down the highway or at your local show.

[RK Series Street Metal High Flow Air Intakes for Harley-Davidson Motorcycles]
  • Designed for Harley-Davidson motorcycles
  • Increase horsepower and torque
  • Easy to install
  • Made in USA
  • Backed by K&N warranty


Product Specifications 
Estimated Horsepower Gain:10.67 HP @ 4882 RPM
Air Filter Color:Red
Air Filter Height:2.188 in (56 mm)
Air Filter Inside Diameter:5.25 in (133 mm)
Air Filter Material:Cotton Gauze
Air Filter Outlet Shape:Not Flanged
Air Filter Shape:Unique
California Restricted:Not legal for sale or use in California
Clamp Material:No Clamps Required
Clamp Style:No Clamps Required
Color:Red
Filter Material:Cotton Gauze
Inlet Diameter:2.25 in (57 mm)
Intake Pipe Ports:All intake tube ports needed for the specified applications are included
Mass Air Flow Sensor Adapter Included:Mass Air Flow Sensor Adapter Included When Required
Mounting Hardware Included:Yes
Neck Flange:2.25 in (57 mm)
Overall Height:4.75 in (121 mm)
Part Number:RK-3937
Product Box Height:4.88 in (124 mm)
Product Box Length:11.75 in (298 mm)
Product Box Width:9.5 in (241 mm)
Product Style:Motorcycle Intake System
Replacement Filter:E-3333
Size:9-11
Street Legal In All US States:No
Style:Standard
Top Material/Finish:Chrome
Top Style:Aluminum - Scalloped Design
TUV Approved (Europe):No
Vacuum Tubing Included:No
Weight:4.8 lb (2.2 kg)

Horsepower gains based on similar vehicle dynamometer test. Results will vary.



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