K&N RU-4250 Universal Clamp-On Air Filter 3.75" Flange Washable

Vehicle Fitment

• Universal fit - designed to clamp onto any intake with approx. 3.75" (95 mm) inside-diameter flange

Features

• Universal clamp-on design for a wide variety of vehicles and custom applications
• High-flow cotton gauze media engineered for enhanced 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 (~1.5 mm) for easier fitment
• Round tapered filter shape fits many intake layouts and custom systems
• Easy installation - simply clamp over the correct flange and tighten
• Reduces disposable filter waste thanks to reusable design
• Backed by 1-Year Limited Manufacturer Warranty

Specifications

• Flange inside diameter: 3.75 in (95 mm)
• Overall filter height: 5.00 in (127 mm)
• Base (large end) outside diameter: 5.375 in (137 mm)
• Top (small end) outside diameter: 4.375 in (111 mm)
• Flange length: 0.625 in (16 mm)
• Filter media: Premium multi-layer cotton gauze
• Washable/reusable: Yes
• Weight: approx. 1.2 lb (0.5 kg)
• Warranty: 1-Year Limited

Included Components

• 1x Universal clamp-on air filter (Part No. RU-4250)
• Installation instructions/documentation

Product Description

Upgrade your intake with the K&N RU-4250 Universal Clamp-On Air Filter. Built to fit a broad range of intake applications with a 3.75" (95 mm) inside-diameter flange, this filter combines reusable performance and high-flow design to improve airflow and filtration. It's ideal for custom builds, hot-rods, trucks, and any aftermarket intake setup where a clamp-on filter is required.

The RU-4250 features a durable molded rubber flange for firm fitment and vibration absorption, and a cone-shaped, tapered body for enhanced airflow and fitment versatility. With washable cotton gauze media, you'll spend less over the life of your vehicle while maintaining excellent filtration. As this is a universal fit product, ensure your intake flange is approximately 3.75" (95 mm) and verify clearance in your engine bay prior to installation.