Harley Davidson FLFB Fat Boy Performance Cold Air Intakes

Buy now from the K&N Store and get a 100% Money Back Guarantee on any cold air intake system!

  • Designed to increase power and torque
  • K&N Million Mile Limited Warranty®
  • Replaces restrictive factory air intake system
  • Easy to install performance, usually in 90 minutes or less

Add more horsepower to your Harley Davidson FLFB Fat Boy with a K&N cold air intake system. K&N Harley Davidson FLFB Fat Boy cold air intakes are easy to install and add power & acceleration while protecting the vehicle's engine.

  1. 2019 Harley Davidson FLFB Fat Boy 107 CI air intake
    $399.99 Regular Price $279.99 Special Price
    63-1138
    K&N
  2. 2019 Harley Davidson FLFB Fat Boy 107 CI air intake
    $299.99 Regular Price $249.99 Special Price
    57-1138
    K&N
  3. 2019 Harley Davidson FLFB Fat Boy 107 CI air intake
    $199.99 Regular Price $149.99 Special Price
    63-1139
    K&N
  4. 2019 Harley Davidson FLFB Fat Boy 107 CI air intake
    $399.99 Regular Price $279.99 Special Price
    63-1138C
    K&N
  5. 2019 Harley Davidson FLFB Fat Boy 107 CI air intake
    $199.99 Regular Price $149.99 Special Price
    57-1139S
    K&N
  6. 2019 Harley Davidson FLFB Fat Boy 107 CI air intake
    $349.99 Regular Price $299.99 Special Price
    57-1138C
    K&N
  7. 2019 Harley Davidson FLFB Fat Boy 107 CI air intake
    $199.99 Regular Price $149.99 Special Price
    57-1139
    K&N
  8. 2018 Harley Davidson FLFB Fat Boy 107 CI air intake
    $399.99 Regular Price $279.99 Special Price
    63-1138
    K&N
  9. 2018 Harley Davidson FLFB Fat Boy 107 CI air intake
    $199.99 Regular Price $149.99 Special Price
    63-1139
    K&N
  10. 2018 Harley Davidson FLFB Fat Boy 107 CI air intake
    $399.99 Regular Price $279.99 Special Price
    63-1138C
    K&N
  11. 2018 Harley Davidson FLFB Fat Boy 107 CI air intake
    $299.99 Regular Price $249.99 Special Price
    57-1138
    K&N
  12. 2018 Harley Davidson FLFB Fat Boy 107 CI air intake
    $349.99 Regular Price $299.99 Special Price
    57-1138C
    K&N
  13. 2018 Harley Davidson FLFB Fat Boy 107 CI air intake
    $199.99 Regular Price $149.99 Special Price
    57-1139S
    K&N
  14. 2018 Harley Davidson FLFB Fat Boy 107 CI air intake
    $199.99 Regular Price $149.99 Special Price
    57-1139
    K&N
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