K&N High Flow Air Filter HD-1390 Replacement - Harley Touring & Softail
About K&N
K&N pioneered the washable, reusable cotton-gauze air filter and has been building intake products since 1969. On a V-twin, an intake swap is usually step one of the classic uncork — filter, exhaust, then tune.
Upgrade your Harley-Davidson Touring or Softail with the K&N HD-1390 High Flow Air Filter to unlock improved engine performance. This direct replacement filter is engineered to provide your V-twin with a significant boost in airflow, leading to more responsive power delivery.
Why riders pick this
- Increases engine airflow for improved performance
- Multi-layer pleated cotton-gauze for effective filtration
- Washable and reusable for lasting value
- Direct fit into OEM airbox without modifications
- Pre-oiled and ready to install
- Designed for long service intervals
The K&N HD-1390 features multi-layer pleated cotton-gauze media, designed to maximize the filtration surface area while allowing substantially more air to pass through than a stock paper filter. This enhanced airflow is crucial for optimal combustion, helping your engine perform at its best. It's a foundational upgrade for riders looking to get more out of their Harley.
Engineered for Airflow and Durability
- Pleated cotton-gauze media for a large filtration area and increased airflow
- Washable and reusable design ensures long-term performance and value
- Pre-oiled and ready for immediate, straightforward installation
- Application-specific sealing bead provides a precise fit in the OEM airbox
- Designed for long service intervals between cleanings
A Simple Yet Effective Power Upgrade
Installing the K&N HD-1390 High Flow Air Filter is a simple bolt-on process that typically does not require any fuel management retuning. It's engineered to integrate seamlessly with your bike's stock system, making it an accessible performance enhancement for your Touring or Softail. The reusable nature of this filter means it's a smart, one-time purchase that will serve your motorcycle for years to come.
Specifications
- Brand: K&N
- Manufacturer Part #: HD-1390
- UPC: 024844023353
- Length: 8.5 in
- Width: 8.5 in
- Height: 3.62 in
- Weight: 1.1 lbs
Common questions
Will this air filter require my bike to be retuned?
No, K&N designed this high-flow air filter to work with your stock fuel map, and fuel management modifications are not normally required.
Is this filter washable and reusable?
Yes, the cotton gauze element of this K&N filter is washable and reusable. Regular cleaning and re-oiling will maintain its optimal performance.
What models does the HD-1390 fit?
This filter is compatible with various Harley-Davidson Touring, Softail, and Dyna models from 1990-1999. Please use our Shop by Bike tool to confirm fitment for your specific year and model.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | K&N |
| TYPE | Air Filters |
| SKU | 721390 |
| WEIGHT | 1.1 lb |
