K&N Street Metal performance air intake systems increase power by replacing the restrictive stock OE air cleaner with a K&N complete performance air intake system.
K&N Street Metal Air Intake Systems for Harley Davidson motorcycles replace the restrictive stock OE air cleaner with an oversized K&N High-Flow Air Filter and a high-volume cast aluminum housing. If you're looking for an aggressive appearance but want a significant increase in airflow, resulting in more power, this high-flow air intake system is exactly what your Harley needs. Installation is so simple, it can usually be done in 90 minutes or less. The K&N air filter is washable, reusable, pre-oiled and ready for installation. This intake system features an updated, modern look with an oval-shaped silver housing. Silver details and sanded fins further enhance the streamlined look. Internal breathers provide a sleek, clean appearance. This air intake has a classic styling with a savage appeal.
  • Guaranteed to increase horsepower
  • Designed to improve throttle response and engine sound
  • Cast aluminum high-volume, performance air intake housing in silver
  • Washable and reusable K&N High-Flow cotton air filter that provides outstanding performance and protection
  • Integrated internal velocity stack
  • Built-in breathers replace external OE breathers
  • Easy to install, usually in 90 minutes or less

Application Summary:

Year Make/Model
2018-2020 Harley-Davidson FLDE Deluxe 107
2018-2019 Harley-Davidson FLFB Fat Boy 107
2018-2023 Harley-Davidson FLFBS Fat Boy 114
2018-2021 Harley-Davidson FLHC Heritage Classic 107
2018-2023 Harley-Davidson FLHCS Heritage Classic 114
2017-2022 Harley-Davidson FLHR Road King
2018-2023 Harley-Davidson FLHRXS Road King Special
2019-2022 Harley-Davidson FLHT Electra Glide Standard
2017-2019 Harley-Davidson FLHTCU Electra Glide Ultra Classic
2017-2023 Harley-Davidson FLHTCUTG Tri Glide Ultra
2017-2023 Harley-Davidson FLHTK Ultra Limited
2017-2019 Harley-Davidson FLHTKL Ultra Limited Low
2017-2023 Harley-Davidson FLHX Street Glide
2017-2023 Harley-Davidson FLHXS Street Glide Special
2017-2023 Harley-Davidson FLRT Freewheeler
2018-2021 Harley-Davidson FLSB Sport Glide 107
2018-2021 Harley-Davidson FLSL Softail Slim 107
2020-2023 Harley-Davidson FLTRK Road Glide Limited
2023 Harley-Davidson FLTRT Road Glide 3
2017-2019 Harley-Davidson FLTRU Road Glide Ultra
2017-2023 Harley-Davidson FLTRX Road Glide
2017-2023 Harley-Davidson FLTRXS Road Glide Special
2018-2020 Harley-Davidson FXBB Street Bob 107
2021-2023 Harley-Davidson FXBBS Street Bob 114
2018-2019 Harley-Davidson FXBR Breakout 107
2018-2021 Harley-Davidson FXBRS Breakout 114
2018-2019 Harley-Davidson FXFB Fat Bob 107
2018-2023 Harley-Davidson FXFBS Fat Bob 114
2018-2020 Harley-Davidson FXLR Low Rider 107
2020-2021 Harley-Davidson FXLRS Low Rider S 114
2022 Harley-Davidson FXLRS Low Rider S 117
2020-2023 Harley-Davidson FXST Softail Standard 107
Attributes
Air Filter Color Red
Air Filter Height 2.406 in (61 mm)
Air Filter Material Cotton Gauze
Air Filter Washable Yes
Alternate Part Number RK-3956S
California Proposition 65 WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
CARB EO Number D-269-60/83/104
Color / Finish Red Filter, Black Top
Country of Origin (Primary) CN
Emission Code Legal US
Estimated Horsepower Gain 5.19 HP @ 4981 RPM
Harmonized Tariff Code (Schedule B) 8421310000
Hazardous Material Code N
Horse Power Increase 5 HP
Life Cycle Status Code Available to Order
Mounting Hardware Included Yes
Overall Height 4.25 in (108 mm)
Package Material Corrugated
Package Type Box
Product Style Motorcycle Intake System
Replacement Filter E-3988
RPM 4981
SDR Required Flag N
Street Legal In All US States Not legal for sale or use in California on any pollution controlled motor vehicle. NOTE: Some specific models and years may be legal in CA. Check the CARB status on your parts at knfilters.com.
Top Material Silver Powder Coated
TUV Approved (Europe) No
Warranty No-Hassle Lifetime Limited
Warranty Time 3
Weight 4.3 lb (1.9 kg)
GTIN 00024844366979

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