K&N Engineering E-3988 Universal Custom Air Filter for Harley-Davidson RK Series

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. The K&N replacement air filter for RK Series air cleaner assemblies, designed for Harley-Davidson motorcycles, are designed to increase horsepower and acceleration while providing excellent filtration.

• Million Mile Limited Warranty®
• Million Mile Limited Warranty

The K&N Engineering E-3988 universal air filter is specifically designed for Harley-Davidson RK Series air cleaner assemblies, providing an upgrade that enhances both horsepower and acceleration. This oval-shaped filter features a high-flow cotton gauze media that ensures excellent filtration while maximizing airflow to your engine. Its washable and reusable design makes it a cost-effective and environmentally friendly choice for motorcycle enthusiasts seeking improved performance.

Constructed with durability in mind, the K&N E-3988 air filter is built to withstand the rigors of regular use, offering a long-lasting solution backed by the renowned Million-Mile Limited Warranty. This warranty reflects K&N's confidence in the quality and longevity of their products, giving you peace of mind on every ride. Designed to fit seamlessly into your Harley-Davidson RK Series air cleaner assembly, this filter maintains optimal airflow and filtration efficiency.

Installation is straightforward, making it an ideal upgrade for riders looking to boost their motorcycle's performance without extensive modifications. Regular maintenance involves simple cleaning and re-oiling, restoring the filter to peak condition and ensuring consistent performance over time. Whether you're enhancing your motorcycle for daily riding or long-distance touring, the K&N E-3988 air filter is a reliable choice for maximizing engine output while maintaining superior filtration.

Features:

• Designed for Harley-Davidson RK Series air cleaner assemblies

• High-flow cotton gauze media for increased airflow and filtration

• Washable and reusable for long-term use

• Backed by K&N's Million-Mile Limited Warranty

• Easy to install with a precise fit for improved performance

• Durable construction designed to withstand rigorous riding conditions

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