K&N RC-4780 Universal High-Flow Clamp-On Air Filter

Vehicle Fitment

• Universal application - suitable for a wide range of vehicles, racing builds, off-road rigs, specialty equipment and custom intake systems. Dimensions must be verified before installation.

Features

• High-flow washable and reusable performance air filter media
• Layered oiled cotton-gauze construction for maximum airflow and effective filtration
• Improves horsepower and throttle response by reducing intake restriction
• Clamp-on drop-in design - ideal for custom or universal intake systems without factory housing requirements
• Molded flexible rubber flange absorbs vibration and allows secure clamp-fit in many installations
• Durable design built for long-term use under normal operating conditions
• Eco-friendly reusable design helps reduce waste compared to disposable filters
• Backed by K&N's limited warranty for universal filter applications

Specifications

• Flange Inside Diameter: 4.00 in (102 mm)
• Flange Length: 1.6875 in (43 mm)
• Outside Diameter: 6.63 in (168 mm)
• Height: 9.50 in (241 mm)
• Filter Media: Multi-layer cotton gauze, oiled
• Wash/Reuse Interval: Clean approximately every 50,000-75,000 miles under normal highway conditions
• Weight: approx. 3.0 lb (1.4 kg)

Included Components

• 1x K&N RC-4780 Universal High-Flow Clamp-On Air Filter (pre-oiled)

Product Description

The K&N RC-4780 is a premium universal high-flow clamp-on air filter designed for custom intake systems, performance builds, off-road setups and specialty equipment where a vehicle-specific filter may not apply. Its sizable dimensions - featuring a ~4-inch flange inside diameter, ~6.63-inch outside diameter and ~9.5-inch height - allow for substantial airflow capacity while still maintaining effective filtration through its oiled cotton-gauze media.

Installation is straightforward: just clamp the RC-4780 to your intake tube or adapter where the flange matches, and you're ready. The flexible rubber flange helps absorb vibration and secure a reliable fit. Because this filter is reusable and washable, it offers long-term cost-savings and reduces waste compared to traditional disposable filters.

Ideal for performance enthusiasts, custom builders, off-road rigs and specialty equipment, the RC-4780 delivers a performance boost and flexibility in fitment. Always verify your intake flange diameter, available clearance (height and outside diameter) and mounting orientation before installation to ensure compatibility. This universal filter brings both adaptability and quality filtration to your build.