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2008-2017 Harley Davidson FLSTF Fat Boy Base Intake System

$349.99

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Description

PRODUCT OVERVIEW

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 which is replaced by a complete high-flow K&N air intake system. This air intake system is constructed with an extra tall K&N air filter providing more air flow and longer service intervals than standard RK-series air intake filters. The extra tall air filter design is intended to be used on larger or custom engine builds that would benefit from higher levels of air flow. Installation is simple with a sturdy, custom aluminum backing plate that 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 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.

PRODUCT DETAILS

Part Number:
knnRK-3947XB
Description:
Street Metal Series Intake System
Air Filter Color:
Red
Air Filter Height:
3.125 in (79 mm)
Air Filter Material:
Cotton Gauze
California Restricted:
Not legal for sale or use in California
Color:
Red
Estimated Horsepower Gain:
8.1 HP @ 4.493 RPM
Horse Power Increase:
8 HP
Mounting Hardware Included:
Yes
Overall Height:
3.125 in (79 mm)
Product Style:
Motorcycle Intake System
Replacement Filter:
E-3986
RPM:
4
Title:
K&N RK-3947XB Intake System-Harley Davidson
Top Material/Finish:
Black Powder Coated
Weight:
4.3 lb (2 kg)
Color / Finish:
Red Filter, Metal Top
Top Material:
Black Powder Coated
Product Box Height:
4.88 in (124 mm)
Product Box Length:
11.75 in (298 mm)
Product Box Width:
9.5 in (241 mm)
Street Legal In All US States:
No
TUV Approved (Europe):
No
Air Filter Washable:
Yes
CARB EO Number:
D-269-59
Package Material:
Paperboard
Package Type:
Box
Warranty:
12 Months
Prop 65 (C, R or CR):
CR
Prop 65 – Short Label:
WARNING: Cancer and Reproductive Harm – www.p65warnings.ca.gov
Prop 65 Warning Label:
https://www.knfilters.com/images/l/prop65.jpg
Prop 65 Yes/No:
Yes

VEHICLE FITMENT

  • 2008-2011 Harley Davidson FLHR Road King Base –.1584cc Air Intake Systems::Cold Air Intakes 
    2008: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2009: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2010: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2011: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2012-2016 Harley Davidson FLHR Road King Base –.1690cc Air Intake Systems::Cold Air Intakes 
    2012: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2013: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2014: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2015: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2016: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2008-2010 Harley Davidson FLHRC Road King Classic Base –.1584cc Air Intake Systems::Cold Air Intakes 
    2008: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2009: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2010: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2011-2013 Harley Davidson FLHRC Road King Classic Base –.1690cc Air Intake Systems::Cold Air Intakes 
    2011: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2012: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2013: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2008 Harley Davidson FLHRSE4 Screamin Eagle Road King Base –.1801cc Air Intake Systems::Cold Air Intakes 
    2008: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2008-2010 Harley Davidson FLHT Electra Glide Standard Base –.1584cc Air Intake Systems::Cold Air Intakes 
    2008: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2009: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2010: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2008-2011 Harley Davidson FLHTC Electra Glide Classic Base –.1584cc Air Intake Systems::Cold Air Intakes 
    2008: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2009: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2010: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2011: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2012-2013 Harley Davidson FLHTC Electra Glide Classic Base –.1690cc Air Intake Systems::Cold Air Intakes 
    2012: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2013: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2008-2011 Harley Davidson FLHTCU Electra Glide Ultra Classic Base –.1584cc Air Intake Systems::Cold Air Intakes 
    2008: California Air Resources Board Exempt: No; Motorcycle Intake System - Flare - Black, Large Capacity
2009: California Air Resources Board Exempt: No; Motorcycle Intake System - Flare - Black, Large Capacity
2010: California Air Resources Board Exempt: No; Motorcycle Intake System - Flare - Black, Large Capacity
2011: California Air Resources Board Exempt: No; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2012-2015 Harley Davidson FLHTCU Electra Glide Ultra Classic Base –.1690cc Air Intake Systems::Cold Air Intakes 
    2012: California Air Resources Board Exempt: No; Motorcycle Intake System - Flare - Black, Large Capacity
2013: California Air Resources Board Exempt: No; Motorcycle Intake System - Flare - Black, Large Capacity
2014: California Air Resources Board Exempt: No; Motorcycle Intake System - Flare - Black, Large Capacity
2015: California Air Resources Board Exempt: No; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2015 Harley Davidson FLHTCUL Electra Glide Ultra Classic Low Base –.1690cc Air Intake Systems::Cold Air Intakes 
    2015: California Air Resources Board Exempt: No; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2010 Harley Davidson FLHTCUSE5 CVO Ultra Classic Electra Glide Base –.1803cc Air Intake Systems::Cold Air Intakes 
    2010: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2014-2015 Harley Davidson FLHTCUTG Tri Glide Ultra Base –.1690cc Air Intake Systems::Cold Air Intakes 
    2014: California Air Resources Board Exempt: No; Motorcycle Intake System - Flare - Black, Large Capacity
2015: California Air Resources Board Exempt: No; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2009-2013 Harley Davidson FLHTCUTG Tri Glide Ultra Classic Base –.1690cc Air Intake Systems::Cold Air Intakes 
    2009: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2010: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2011: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2012: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2013: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2010-2014 Harley Davidson FLHTK Electra Glide Ultra Limited Base –.1690cc Air Intake Systems::Cold Air Intakes 
    2010: California Air Resources Board Exempt: No; Motorcycle Intake System - Flare - Black, Large Capacity
2011: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2012: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2013: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2014: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2015-2016 Harley Davidson FLHTK Ultra Limited Base –.1690cc Air Intake Systems::Cold Air Intakes 
    2015: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2016: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2015-2016 Harley Davidson FLHTKL Ultra Limited Low Base –.1690cc Air Intake Systems::Cold Air Intakes 
    2015: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2016: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2008-2011 Harley Davidson FLHX Street Glide Base –.1584cc Air Intake Systems::Cold Air Intakes 
    2008: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2009: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2010: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2011: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2012-2016 Harley Davidson FLHX Street Glide Base –.1690cc Air Intake Systems::Cold Air Intakes 
    2012: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2013: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2014: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2015: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2016: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2014-2016 Harley Davidson FLHXS Street Glide Special Base –.1690cc Air Intake Systems::Cold Air Intakes 
    2014: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2015: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2016: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2010-2011 Harley Davidson FLHXXX Street Glide Trike Base –.1690cc Air Intake Systems::Cold Air Intakes 
    2010: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2011: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2015-2016 Harley Davidson FLRT Freewheeler Base –.1690cc Air Intake Systems::Cold Air Intakes 
    2015: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2016: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2016-2017 Harley Davidson FLS Softail Slim Base –.1690cc Air Intake Systems::Cold Air Intakes 
    2016: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2017: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2016-2017 Harley Davidson FLSS Softail Slim S Base –.1801cc Air Intake Systems::Cold Air Intakes 
    2016: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2017: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2016-2017 Harley Davidson FLSTC Heritage Softail Classic Base –.1690cc Air Intake Systems::Cold Air Intakes 
    2016: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2017: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2016-2017 Harley Davidson FLSTF Fat Boy Base –.1690cc Air Intake Systems::Cold Air Intakes 
    2016: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2017: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2016-2017 Harley Davidson FLSTFB Fat Boy Lo Base –.1690cc Air Intake Systems::Cold Air Intakes 
    2016: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2017: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2016-2017 Harley Davidson FLSTFBS Fat Boy S Base –.1801cc Air Intake Systems::Cold Air Intakes 
    2016: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2017: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2016-2017 Harley Davidson FLSTN Softail Deluxe Base –.1690cc Air Intake Systems::Cold Air Intakes 
    2016: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2017: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2008-2011 Harley Davidson FLTR Road Glide Base –.1584cc Air Intake Systems::Cold Air Intakes 
    2008: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2009: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2010: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2011: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2011-2013 Harley Davidson FLTRU Road Glide Ultra Base –.1690cc Air Intake Systems::Cold Air Intakes 
    2011: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2012: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2013: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2015 Harley Davidson FLTRX Road Glide Base –.1690cc Air Intake Systems::Cold Air Intakes 
    2015: California Air Resources Board Exempt: No; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2010-2011 Harley Davidson FLTRX Road Glide Custom Base –.1584cc Air Intake Systems::Cold Air Intakes 
    2010: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2011: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2012-2013 Harley Davidson FLTRX Road Glide Custom Base –.1690cc Air Intake Systems::Cold Air Intakes 
    2012: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2013: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2015-2016 Harley Davidson FLTRXS Road Glide Special Base –.1690cc Air Intake Systems::Cold Air Intakes 
    2015: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2016: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2017 Harley Davidson FXDWG Dyna Wide Glide Base –.1690cc Air Intake Systems::Cold Air Intakes 
    2017: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
  • 2016-2017 Harley Davidson FXSB Breakout Base –.1690cc Air Intake Systems::Cold Air Intakes 
    2016: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity
2017: California Air Resources Board Exempt: Yes; CARB EO: D-269-59; Motorcycle Intake System - Flare - Black, Large Capacity

Additional information

Weight 4.3 lbs

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