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K&N Custom Assy Krk-3929

by K&N
Original price $0.00 - Original price $0.00
Original price $0.00
$724.99 - $724.99
Current price $724.99

In the early 1960s, two motorcycle racers, Ken Johnson and Norm McDonald (K&N) developed a ground-breaking new idea for an air filter. After experimenting with numerous types of filter media, they discovered that an oiled cotton design allowed the filter to not only capture contaminants very efficiently, but also allowed it to be washed and reused, and the original K&N High-Flow Air Filter was born. Five decades later, K&N is still innovating industry-leading filtration technology. In addition to performance air filters, K&N® now manufactures a variety of other protection and performance products, including air intake systems, oil filters & fuel filters, with a reputation for exceptional quality and customer service.

K&N's Sportster RK Series Air Cleaner will get more horsepower from your Harley Davidson Sportster motorcycle. This complete assembly fits inside the stock air cleaner cover, and provides a significant increase in airflow.


  • Increases power
  • Washable and reusable
  • Provides increased airflow
  • Fits inside stock cover


  • Estimated Horsepower Gain: 4.4 HP @ 5497 RPM
  • Replacement Filter: E-3040
  • Air Filter Material: Cotton Gauze
  • Size: 10-12
  • Inlet Diameter: 2.5 in (64 mm)
  • Overall Height: 2.5 in (64 mm)
  • Weight: 3.1 lb (1.4 kg)
  • Neck Flange: 2.5 in (64 mm)
  • Mounting Hardware Included: Yes