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 Dyna, Softail, Touring and Twin-Cam Model motorcycles increase power by eliminating the restrictive stock OE air cleaner and replacing it with an oversized K&N High-Flow Air Filter and a cast aluminum high-volume aluminum housing. K&N high-flow intake systems give your Harley an aggressive appearance while providing a significant increase in airflow resulting in more power.
- Guaranteed to increase horsepower
- Designed to improve throttle response and engine sound
- Cast aluminum high-volume, performance air intake housing
- 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 |
2.469 in (63 mm) |
| Air Filter Included |
Yes |
| Air Filter Material |
Cotton Gauze |
| Air Filter Washable |
Yes |
| Alternate Part Number |
RK-3955S |
| California Proposition 65 |
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov |
| CARB EO Number |
D-269-60/83/104 |
| Color / Finish |
Red Filter, Silver Housing |
| Country of Origin (Primary) |
CN |
| Emission Code |
Legal US |
| Estimated Horsepower Gain |
3.33 HP @ 4710 RPM |
| Harmonized Tariff Code (Schedule B) |
8421310000 |
| Hazardous Material Code |
N |
| Horse Power Increase |
3 HP |
| Item Type |
High Performance |
| Life Cycle Status Code |
Available to Order |
| Mounting Hardware Included |
Yes |
| Overall Height |
3.25 in (83 mm) |
| Package Contents |
1 Air Filter |
| Package Material |
Paperboard |
| Package Quantity |
1 |
| Package Type |
Box |
| Product Style |
Motorcycle Intake System |
| Replacement Filter |
E-3987 |
| RPM |
4710 |
| 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 |
5 lb (2.2 kg) |
| GTIN |
00024844366962 |
