K&N Intake System- for Harley-Davidson
Part # RK-3956S
Features
- 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
Description
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.
Specifications
| Air Filter Color | Red |
|---|---|
| Air Filter Height | 2.406 in (61 mm) |
| Air Filter Material | Cotton Gauze |
| Air Filter Washable | Yes |
| CARB EO Number | D-269-60/83/104 |
| Color / Finish | Red Filter, Black Top |
| Estimated Horsepower Gain | 5.19 HP @ 4981 RPM |
| 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 |
| 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 |
| Weight | 4.3 lb (1.9 kg) |
| UPC / GTIN | 00024844366979 |
| Warranty | No-Hassle Lifetime Limited warranty |
| Year | Make | Model | Note |
|---|---|---|---|
| 2018 - 2020 | Harley-Davidson | FLDE Deluxe 107 | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2018 - 2019 | Harley-Davidson | FLFB Fat Boy 107 | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2018 - 2021 | Harley-Davidson | FLFBS Fat Boy 114 | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2022 - 2023 | Harley-Davidson | FLFBS Fat Boy 114 | California Air Resources Board Exempt: No; Motorcycle Intake System - RK Series - Silver |
| 2018 - 2021 | Harley-Davidson | FLHC Heritage Classic 107 | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2018 - 2021 | Harley-Davidson | FLHCS Heritage Classic 114 | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2022 - 2023 | Harley-Davidson | FLHCS Heritage Classic 114 | California Air Resources Board Exempt: No; Motorcycle Intake System - RK Series - Silver |
| 2017 | Harley-Davidson | FLHR Road King | California Air Resources Board Exempt: Yes; CARB EO: D-269-60; Motorcycle Intake System - RK Series - Silver |
| 2018 - 2021 | Harley-Davidson | FLHR Road King | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2022 | Harley-Davidson | FLHR Road King | California Air Resources Board Exempt: No; Motorcycle Intake System - RK Series - Silver |
| 2018 | Harley-Davidson | FLHRXS Road King Special | California Air Resources Board Exempt: Yes; CARB EO: D-269-83; Motorcycle Intake System - RK Series - Silver |
| 2019 - 2021 | Harley-Davidson | FLHRXS Road King Special | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2022 - 2023 | Harley-Davidson | FLHRXS Road King Special | California Air Resources Board Exempt: No; Motorcycle Intake System - RK Series - Silver |
| 2017 - 2019 | Harley-Davidson | FLHTCU Electra Glide Ultra Classic | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2017 - 2018 | Harley-Davidson | FLHTCUTG Tri Glide Ultra | California Air Resources Board Exempt: Yes; CARB EO: D-269-60; Motorcycle Intake System - RK Series - Silver |
| 2019 - 2021 | Harley-Davidson | FLHTCUTG Tri Glide Ultra | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2022 - 2023 | Harley-Davidson | FLHTCUTG Tri Glide Ultra | California Air Resources Board Exempt: No; Motorcycle Intake System - RK Series - Silver |
| 2019 - 2021 | Harley-Davidson | FLHT Electra Glide Standard | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2022 | Harley-Davidson | FLHT Electra Glide Standard | California Air Resources Board Exempt: No; Motorcycle Intake System - RK Series - Silver |
| 2017 - 2018 | Harley-Davidson | FLHTKL Ultra Limited Low | California Air Resources Board Exempt: Yes; CARB EO: D-269-60; Motorcycle Intake System - RK Series - Silver |
| 2019 | Harley-Davidson | FLHTKL Ultra Limited Low | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2017 - 2018 | Harley-Davidson | FLHTK Ultra Limited | California Air Resources Board Exempt: Yes; CARB EO: D-269-60; Motorcycle Intake System - RK Series - Silver |
| 2019 - 2021 | Harley-Davidson | FLHTK Ultra Limited | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2022 - 2023 | Harley-Davidson | FLHTK Ultra Limited | California Air Resources Board Exempt: No; Motorcycle Intake System - RK Series - Silver |
| 2017 - 2018 | Harley-Davidson | FLHXS Street Glide Special | California Air Resources Board Exempt: Yes; CARB EO: D-269-60; Motorcycle Intake System - RK Series - Silver |
| 2019 - 2021 | Harley-Davidson | FLHXS Street Glide Special | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2022 - 2023 | Harley-Davidson | FLHXS Street Glide Special | California Air Resources Board Exempt: No; Motorcycle Intake System - RK Series - Silver |
| 2017 | Harley-Davidson | FLHX Street Glide | California Air Resources Board Exempt: Yes; CARB EO: D-269-60; Motorcycle Intake System - RK Series - Silver |
| 2018 - 2021 | Harley-Davidson | FLHX Street Glide | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2022 - 2023 | Harley-Davidson | FLHX Street Glide | California Air Resources Board Exempt: No; Motorcycle Intake System - RK Series - Silver |
| 2017 - 2018 | Harley-Davidson | FLRT Freewheeler | California Air Resources Board Exempt: Yes; CARB EO: D-269-60; Motorcycle Intake System - RK Series - Silver |
| 2019 - 2021 | Harley-Davidson | FLRT Freewheeler | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2022 - 2023 | Harley-Davidson | FLRT Freewheeler | California Air Resources Board Exempt: No; Motorcycle Intake System - RK Series - Silver |
| 2018 - 2021 | Harley-Davidson | FLSB Sport Glide 107 | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2022 | Harley-Davidson | FLSB Sport Glide 107 | California Air Resources Board Exempt: No; Motorcycle Intake System - RK Series - Silver |
| 2018 - 2021 | Harley-Davidson | FLSL Softail Slim 107 | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2020 - 2021 | Harley-Davidson | FLTRK Road Glide Limited | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2022 - 2023 | Harley-Davidson | FLTRK Road Glide Limited | California Air Resources Board Exempt: No; Motorcycle Intake System - RK Series - Silver |
| 2023 | Harley-Davidson | FLTRT Road Glide 3 | California Air Resources Board Exempt: No; Motorcycle Intake System - RK Series - Silver |
| 2017 - 2018 | Harley-Davidson | FLTRU Road Glide Ultra | California Air Resources Board Exempt: Yes; CARB EO: D-269-60; Motorcycle Intake System - RK Series - Silver |
| 2019 | Harley-Davidson | FLTRU Road Glide Ultra | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2017 | Harley-Davidson | FLTRX Road Glide | California Air Resources Board Exempt: Yes; CARB EO: D-269-60; Motorcycle Intake System - RK Series - Silver |
| 2018 - 2021 | Harley-Davidson | FLTRX Road Glide | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2022 - 2023 | Harley-Davidson | FLTRX Road Glide | California Air Resources Board Exempt: No; Motorcycle Intake System - RK Series - Silver |
| 2017 | Harley-Davidson | FLTRXS Road Glide Special | California Air Resources Board Exempt: Yes; CARB EO: D-269-60; Motorcycle Intake System - RK Series - Silver |
| 2018 - 2021 | Harley-Davidson | FLTRXS Road Glide Special | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2022 - 2023 | Harley-Davidson | FLTRXS Road Glide Special | California Air Resources Board Exempt: No; Motorcycle Intake System - RK Series - Silver |
| 2021 - 2023 | Harley-Davidson | FXBBS Street Bob 114 | California Air Resources Board Exempt: No; Motorcycle Intake System - RK Series - Silver |
| 2018 - 2020 | Harley-Davidson | FXBB Street Bob 107 | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2018 - 2019 | Harley-Davidson | FXBR Breakout 107 | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2018 - 2021 | Harley-Davidson | FXBRS Breakout 114 | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2018 - 2019 | Harley-Davidson | FXFB Fat Bob 107 | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2018 - 2021 | Harley-Davidson | FXFBS Fat Bob 114 | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2022 - 2023 | Harley-Davidson | FXFBS Fat Bob 114 | California Air Resources Board Exempt: No; Motorcycle Intake System - RK Series - Silver |
| 2018 - 2020 | Harley-Davidson | FXLR Low Rider 107 | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2020 - 2021 | Harley-Davidson | FXLRS Low Rider S 114 | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2022 | Harley-Davidson | FXLRS Low Rider S 117 | California Air Resources Board Exempt: No; Motorcycle Intake System - RK Series - Silver |
| 2022 - 2025 | Harley-Davidson | FXLRST Low Rider ST 117 | California Air Resources Board Exempt: No; Motorcycle Intake System - RK Series - Silver |
| 2020 - 2021 | Harley-Davidson | FXST Softail Standard 107 | California Air Resources Board Exempt: Yes; CARB EO: D-269-104; Motorcycle Intake System - RK Series - Silver |
| 2022 - 2023 | Harley-Davidson | FXST Softail Standard 107 | California Air Resources Board Exempt: No; Motorcycle Intake System - RK Series - Silver |