K&N Unique Air Filter - Replacement Element for RK-3931

The K&N replacement air filter for RK Series air cleaner assemblies is designed to increase horsepower and acceleration while providing excellent filtration. The air filter is washable and reusable and designed to be used as a replacement air filter for specific K&N RK Series air cleaner assemblies for Harley-Davidson® motorcycles. The air filter is covered by the famous K&N Million-Mile Limited Warranty.

• Replacement air filter for specific RK Series air cleaner assemblies.
• High air flow filter media provides exceptional filtration
• Designed to boost horsepower and rate of acceleration
• Million Mile Limited Warranty®
• Washable and reusable