K&N Filters Intake System for 0816 Harley-Davidson – Black Top – Red Filter (KNNRK-3951)

The K&N Filters Intake System for 0816 Harley-Davidson – Black Top – Red Filter (KNNRK-3951) is designed to increase horsepower and torque while improving throttle response. Featuring a bold red filter and black top, this system enhances your bike’s look and performance. It’s built for select 2008-2016 Harley-Davidson models and engineered to optimize airflow, helping your engine breathe better on every ride. Easy to install and built with durability in mind, it’s a smart upgrade for riders who want more power.

Features and Specifications:

• Product Type: Motorcycle Intake System
• Fitment: 2008-2016 Harley-Davidson motorcycles
• Air Filter Color: Red
• Top Material: Black
• Air Filter Height: 2.469 in (63 mm)
• Estimated Horsepower Gain: 6.04 HP @ 4907 RPM
• Replacement Filter: E-3987
• CARB EO Number: D-269-59
• Horsepower Boost: Increases engine horsepower for improved performance.
• Throttle Response: Enhances throttle sensitivity and engine sound.
• Durable Housing: Cast aluminum, high-volume intake in sleek black finish.
• High-Flow Filter: Washable and reusable K&N cotton air filter for superior airflow and protection.
• Velocity Stack: Integrated internal design for optimized air intake.
• Built-In Breathers: Replaces external OE breathers with an internal system.
• Quick Installation: Installs easily in 90 minutes or less.
• Street Legal In All US States: Not legal for sale or use in California on any pollution-controlled motor vehicle. NOTE: Some specific models and years may be legal in CA. Check the CARB status of your vehicle in the application listings.