K&N RE-0870 Universal High-Flow Clamp-On Air Filter (4" Flange, 9" H)

Vehicle Fitment

• Universal application - fits a wide variety of vehicles, custom intake systems, racing builds, off-road rigs, generators, tractors and specialty equipment. 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 superior filtration
• Designed to improve engine performance and throttle response by reducing intake restriction
• Clamp-on drop-in design for custom or universal intake systems - no factory housing required
• Molded flexible rubber flange absorbs vibration and allows secure clamp-fit in many installations
• Durable construction built for long-term use under normal conditions
• Eco-friendly reusable design reduces waste compared to disposable filters
• Backed by K&N's warranty for universal filter applications

Specifications

• Flange Inside Diameter: 4.00 in (102 mm)
• Base Outside Diameter: 6.00 in (152 mm)
• Top Outside Diameter: 4.625 in (117 mm)
• Height: 9.00 in (229 mm)
• Flange Length: 1.75 in (44 mm)
• Filter Media: Multi-layer cotton gauze, oiled
• Shape: Round tapered clamp-on style
• Weight: approx. 2.0 lb (0.9 kg)

Included Components

• 1x K&N RE-0870 Universal High-Flow Clamp-On Air Filter (pre-oiled)

Product Description

The K&N RE-0870 is a premium universal high-flow clamp-on air filter designed for custom intake systems, performance builds, off-road rigs, generators and specialty equipment where standard vehicle-specific filters may not apply. Its tapered round design, featuring a 4-inch flange diameter and 9-inch height, allows for substantial airflow while still maintaining effective filtration thanks to the oiled cotton-gauze media.

Installation is straightforward: clamp the RE-0870 onto your intake tube or adapter matching the 4-inch flange inside diameter, ensuring clearance around its ~6-inch base outside diameter and ~9-inch height. Because it's reusable, you'll save on replacement costs and help reduce waste compared to disposable filters.

Ideal for performance enthusiasts, custom builders and specialty equipment users, the RE-0870 offers both performance and flexibility in fitment. Always verify the intake flange diameter, available height and mounting orientation before installation to ensure proper fit and optimum results.