K&N RK-3947X High-Flow Air Intake System

Upgrade your Harley-Davidson motorcycle with the K&N RK-3947X High-Flow Air Intake System. This sleek and stylish intake system is designed to replace the stock OE air cleaner, delivering enhanced airflow for improved horsepower and torque. Perfectly suited for models like the Harley Davidson FLHR Road King (2008-2016), this system is a game-changer for riders looking to boost their bike's performance.

Key Features

• Air Filter Color: Red
• Air Filter Height: 3.125 in (79 mm)
• Material: Cotton Gauze
• Washable: Yes
• Estimated Horsepower Gain: 8.1 HP @ 4,493 RPM
• Weight: 4.3 lb (2 kg)
• Warranty: No-Hassle Lifetime Limited

Performance Benefits

This intake system features an extra tall air filter that allows for greater airflow, perfect for larger or custom engine builds. Riders have reported noticeable improvements in throttle response and overall performance, making it an ideal choice for those who demand more from their bikes. The K&N air filter is pre-oiled and ready for installation, allowing you to get back on the road in under 90 minutes.

Installation Made Easy

The RK-3947X comes with all necessary mounting hardware and a durable mounting gasket to absorb vibrations. The custom aluminum backing plate mounts directly to the throttle body, ensuring a secure fit. For detailed installation instructions, click here.

Fitment

This air intake system is compatible with a wide range of Harley-Davidson models, including:

• FLHR Road King (2008-2016)
• FLHRC Road King Classic (2008-2013)
• FLHT Electra Glide Standard (2008-2010)
• FLHX Street Glide (2008-2016)
• And many more...

Customer Feedback

Many riders have praised the RK-3947X for its easy installation and noticeable performance boost. With the added airflow, enthusiasts report smoother acceleration and a more aggressive sound, making it a popular choice among Harley owners looking to personalize their ride.

Specifications

• CARB EO Number: D-269-59
• Street Legal: Yes, in all US states (check vehicle applications)
• Top Material: Chrome
• RPM: 4