K&N Engineering HD-0818 High-Flow Replacement Air Filter for 2016–2017 Harley-Davidson FLSS Softail Slim S

The K&N High-Flow Air Filter for Motorcycles is engineered to increase airflow for improved horsepower, throttle response, and acceleration while providing increased engine protection. Built with premium oiled cotton gauze, this washable and reusable air filter is designed for long-lasting performance, a precision OEM-style fit, and durable construction to keep your motorcycle performing ride after ride. The K&N High-Flow Air Filter for Motorcycles is engineered to increase airflow for improved horsepower, throttle response, and acceleration while providing increased engine protection. Associated products: HD-0800DK Air Filter Wrap, 99-5000 Filter Care Service Kit Aerosol

• PRECISION OEM-STYLE FIT: Made with application specific seamless sealing beads and custom seals for easy installation (Where Applicable).
• Pleated cotton media provides a large filtration area offering low restriction, high-capacity and long service intervals
• Multiple layers of woven cotton gauze media offers excellent filtration
• Designed to provide increased horsepower and torque
• Washable & reusable, pre-oiled and ready to ride
• Application specific base seal and sealing bead
• No-Hassle Lifetime Limited Warranty
• Made in the USA for over 40 years

The K&N Engineering HD-0818 High-Flow Air Filter is a washable and reusable replacement filter designed for select Harley-Davidson motorcycles. Its premium oiled cotton gauze media is engineered to provide increased airflow for improved horsepower, throttle response, and acceleration while helping protect the engine from harmful contaminants. The precision OEM-style design supports a dependable fit and straightforward installation.

Pleated filtration media creates a large filtering area that helps maintain high airflow, low restriction, and long service intervals. Multiple layers of woven cotton gauze provide effective filtration, while the application-specific base seal and sealing bead help create a secure connection within the factory airbox. The filter arrives pre-oiled and ready to ride, and it can be cleaned, serviced, and reused for long-term value. K&N Engineering supports the HD-0818 with a no-hassle lifetime limited warranty and has manufactured performance filtration products in the USA for over 40 years.

The K&N Engineering HD-0818 fits 2016 and 2017 Harley-Davidson FLSS Softail Slim S motorcycles. An optional HD-0800DK Air Filter Wrap may provide additional protection in demanding riding conditions, while the K&N 99-5000 Filter Care Service Kit Aerosol can be used for routine cleaning and re-oiling. This product is intended for powersports applications and may require applicable emissions-related acknowledgement depending on installation location. Review local requirements before installation.

Key Product Specifications and Technical Data

• Brand: K&N Engineering
• Part Number: HD-0818
• Product Type: High-flow replacement motorcycle air filter
• Filter Media: Premium oiled cotton gauze
• Service Design: Washable and reusable
• Fitment: 2016–2017 Harley-Davidson FLSS Softail Slim S
• Installation: Precision OEM-style replacement design
• Warranty: No-hassle lifetime limited warranty

What's Included

One K&N Engineering HD-0818 washable and reusable high-flow air filter, pre-oiled and ready for installation.

Features:

• Increased Airflow: Helps improve horsepower, throttle response, torque, and acceleration.
• Premium Filtration: Multiple layers of oiled cotton gauze provide effective engine protection.
• Washable and Reusable: Clean and re-oil the filter for extended service life.
• Precision OEM-Style Fit: Application-specific seals and sealing beads support easy installation and reliable airbox sealing.

Fitments:
2016 Harley Davidson FLSS Softail Slim S Base
2017 Harley Davidson FLSS Softail Slim S Base

Air Freight Prohibited: false
Not Carb Approved: false
Carb Acknowledgement Required: true
Ltl Freight Required: false
Prop 65: Y
Part Type: powersports
Epa: N/A
Regular Stock: t
Units Per Sku: 1