K&N RU-4680 Universal Clamp-On Air Filter 4" Flange, Washable Reusable

Vehicle Fitment

• Universal fit - fits any intake with approx. 4.0 in (101.6 mm) inside-diameter flange

Features

• Universal clamp-on design accommodates a wide variety of vehicles, custom intakes, and equipment
• High-flow cotton gauze media engineered for increased horsepower and acceleration
• Washable and reusable filter design for long-term value and reduced replacement cost
• Molded pliable rubber flange absorbs vibration and allows slight size variation (~1/16 in / 1.5 mm)
• Tapered round shape fits many intake configurations including custom builds
• Easy installation - simply slide over the flange and clamp securely
• Reduces waste compared to disposable filters with a reusable option
• Backed by manufacturer's 1-Year Limited Warranty

Specifications

• Flange inside diameter: 4.0 in (101.6 mm)
• Filter height: 7.0 in (177.8 mm)
• Bottom outside diameter: approx. 6.0 in (152.4 mm)
• Top outside diameter: approx. 4.0 in (101.6 mm)
• Flange length: 1.75 in (44.45 mm)
• Filter media: Multi-layer premium cotton gauze
• Washable/reusable: Yes
• Weight: approx. 1.6 lb (0.73 kg)

Included Components

• 1x Universal clamp-on air filter (Part No. RU-4680)
• Installation instructions/documentation

Product Description

The K&N RU-4680 Universal Clamp-On Air Filter is a versatile upgrade for performance vehicles, trucks, and custom intake systems. Designed for any application with an approximate 4.0 in (101.6 mm) inside-diameter flange, it provides high-flow performance and long-life reusable filtration.

Its molded rubber flange absorbs engine bay vibration and allows slight sizing tolerance, while the tapered design improves airflow and fitment flexibility. The washable and reusable media reduces long-term replacement costs and environmental impact. As a universal-fit product (not tied to a specific make, model, or year), always confirm clearance and proper fitment in your intake system before installation.