K&N RU-5100 Universal Clamp-On Air Filter 3.125" Flange, Washable Reusable

Vehicle Fitment

• Universal fit - designed to clamp onto intake systems with approx. 3.125 in (79 mm) inside-diameter flange

Features

• Universal clamp-on design for broad vehicle and custom intake compatibility
• High-flow cotton gauze media engineered to improve horsepower and acceleration
• Washable and reusable filter for long-term value and reduced replacement cost
• Molded rubber flange absorbs vibration and allows slight size variation (~1/16" / 1.5 mm)
• Conical/tapered shape fits many intake configurations including custom and aftermarket systems
• Easy installation - simply slide over the correct flange and clamp securely
• Reduces waste compared to disposable filters thanks to its reusable design
• Backed by manufacturer's 1-Year Limited Warranty

Specifications

• Flange inside diameter: 3.125 in (79 mm)
• Filter height: approx. 7 in (178 mm)
• Base outside diameter (large end): approx. 6 in (152 mm)
• Top outside diameter: approx. 5 in (127 mm)
• Flange length: approx. 1.75 in (44 mm)
• Filter media: Premium multi-layer cotton gauze
• Washable/reusable: Yes
• Approximate weight: 1.6 lb (0.7 kg)

Included Components

• 1x Universal Clamp-On Air Filter (Part No. RU-5100)
• Installation instructions/documentation

Product Description

Upgrade your intake system with the K&N RU-5100 Universal Clamp-On Air Filter. Its 3.125-inch (79 mm) inside-diameter flange makes it an ideal option for custom builds, performance vehicles, trucks, and any setup where a clamp-on filter is required rather than a specific make/model application. Built with high-flow washable cotton gauze media and a durable molded rubber flange for vibration absorption and secure fitment, this filter delivers improved airflow and long-term filtration performance.

Installation is simple: measure your intake flange to confirm it is approximately 3.125 in (79 mm) inside-diameter, slide the RU-5100 filter onto the flange, clamp securely, and you're ready to go. The washable and reusable design means lower long-term cost compared to standard disposable filters. Because this is a universal-fit part (not tied to a specific make/model/year), always verify clearance and proper intake pipe compatibility in your engine bay before installation.