SKU: 57-1139 | UPC: 024844368973
K&N 57-1139 Performance Air Intake System for 2017-2021 Harley-Davidson Touring Models
The K&N 57-1139 replaces the stock OE air cleaner on 2017-2021 Harley-Davidson Touring and select Softail models with a high-flow air filter and cast aluminum intake tube. This intake system boosts airflow for more horsepower improved throttle response and aggressive engine sound. Installation takes 90 minutes or less with included hardware and throttle-body plate.
Key Features
- High-Flow K&N Air Filter: Washable reusable cotton gauze design lasts up to 100000 miles before service delivers excellent filtration and airflow
- Cast Aluminum Intake Tube: High-performance tube eliminates restrictions for substantial power gains and better engine breathing
- Built-in Breathers: Internal breathers replace external OE breathers for a clean integrated appearance
- Integrated Velocity Stack: Enhances air velocity into the engine for quicker throttle response
- Die-Cast Aluminum Throttle-Body Plate: Precision plate with mounting hardware ensures perfect fit and simple bolt-on installation
Product Notes
- Easy installation usually completes in 90 minutes or less with basic tools
- Clean filter every 100000 miles depending on riding conditions for long-term performance
- Ships securely in protective packaging to prevent damage
Installation Notes
- Professional installation recommended.
- Bolt-on design fits directly to stock throttle body in under 90 minutes.
- Includes all necessary mounting hardware and gaskets for compatibility.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2017-2021 | Harley-Davidson | Road King | Base |
| 2018-2021 | Harley-Davidson | Road King Special | Base |
| 2018-2021 | Harley-Davidson | Electra Glide Standard | Base |
| 2017-2019 | Harley-Davidson | Electra Glide Ultra Classic | Base |
| 2017-2021 | Harley-Davidson | Ultra Limited | Base |
| 2017-2019 | Harley-Davidson | Ultra Limited Low | Base |
| 2017-2021 | Harley-Davidson | Street Glide | Base |
| 2017-2021 | Harley-Davidson | Street Glide Special | Base |
| 2017-2021 | Harley-Davidson | Road Glide Special | Base |
| 2018-2020 | Harley-Davidson | Street Bob | 107 Base |
| 2018-2019 | Harley-Davidson | Breakout | 107 Base |
| 2018-2020 | Harley-Davidson | Breakout | 114 Base |
| 2018-2020 | Harley-Davidson | Deluxe | 107 Base |
| 2018-2019 | Harley-Davidson | Fat Boy | 107 Base |
| 2018-2020 | Harley-Davidson | Fat Boy | 114 Base |
| 2018-2021 | Harley-Davidson | Heritage Classic | 107 Base |
| 2018-2021 | Harley-Davidson | Sport Glide | 107 Base |
| 2018-2021 | Harley-Davidson | Softail Slim | 107 Base |
| 2020-2021 | Harley-Davidson | Road Glide Limited | Base |
| 2017-2019 | Harley-Davidson | Road Glide Ultra | Base |
| 2018-2021 | Harley-Davidson | Fat Bob | 114 Base |
| 2018-2020 | Harley-Davidson | Low Rider | 107 Base |
| 2020-2021 | Harley-Davidson | Low Rider S | 114 Base |
| 2020-2021 | Harley-Davidson | Softail Standard | 107 Base |
Why Choose K&N?
- Trusted since 1969 for high-performance air filtration on powersports vehicles
- Dyno-tested systems deliver measurable horsepower increases
- Engineered with precision for exact fit on Milwaukee-Eight engines
Frequently Asked Questions
- Q: Will this fit my 2019 Harley Street Glide?
A: Yes the 57-1139 fits 2017-2021 FLHX Street Glide Base models with Milwaukee-Eight engines. - Q: What material is used for the intake components?
A: Cast aluminum construction for the intake tube and throttle-body plate ensures strength heat resistance and optimal airflow. - Q: What warranty coverage is provided?
A: K&N air filters carry a No-Hassle Lifetime Warranty the complete intake system includes a limited warranty for manufacturing defects.
Shipping & Handling
- Method: Standard ground shipping
- Availability: In stock – ships same or next business day
- Packaging: Original K&N box dimensions 20.5 x 12.5 x 9.44 inches
- Weight: 4.85 lbs shipping weight
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