K&N RU-1039 Universal Clamp-On Round Tapered Air Filter 3in Flange 5in OD 6in H

Vehicle Fitment

• Universal Fit - Designed for performance vehicles, cold air intake systems, racing builds, and any application with a 3.00 in. intake tube requiring a compact clamp-on tapered air filter

Fitment Notes

• This is a universal clamp-on filter - verify your intake tube outside diameter matches the flange inside diameter of 3.00 in. before purchasing
• Rubber flange can be stretched up to 1/16 in. (1.5 mm) to accommodate in-between sizes or angled intake configurations
• Not a direct OEM replacement for a specific vehicle - confirm fitment by measuring your intake tube diameter

Features

• Multi-layer oiled cotton gauze media delivers up to 50% more airflow than standard paper filters
• Round tapered (cone) design maximizes filter surface area for high-CFM airflow performance
• Ultra-strong molded pliable rubber flange absorbs vibration and provides a secure, leak-free attachment
• Washable and reusable - engineered to last the lifetime of your build or vehicle
• Pre-oiled and ready to install straight out of the box
• Flexible rubber flange accommodates angled or offset intake configurations
• Made in the USA
• Backed by K&N's 10-Year/Million Mile Limited Warranty

Specifications

• Shape: Round Tapered (Cone)
• Flange Inside Diameter: 3.00 in. (76 mm)
• Flange Length: 1.75 in. (44 mm)
• Flange Type: Centered (Single)
• Base Outside Diameter: 5.00 in. (127 mm)
• Top Outside Diameter: 3.50 in. (89 mm)
• Height: 6.00 in. (152 mm)
• Filter Material: Multi-layer oiled cotton gauze
• Filter Color: Red
• Top Style: Rubber End Cap
• Inner Wire: No

Included Components

• 1x K&N RU-1039 Universal Clamp-On Round Tapered Air Filter

Product Description

The K&N RU-1039 is a high-flow universal clamp-on round tapered air filter built for performance cold air intakes, racing builds, and high-CFM applications requiring a 3-inch flange. Its tapered cone profile - 5 inches at the base narrowing to 3.50 inches at the top over a 6-inch height - delivers substantial cotton gauze surface area to support demanding intake flows while maintaining excellent contaminant filtration. The multi-layer oiled construction flows significantly more air than any paper element, translating to sharper throttle response and measurable horsepower gains.

The centered 3.00 in. rubber flange mounts securely onto matching intake tubes, absorbs vibration, and can be stretched slightly to fit in-between sizes or angled configurations. Washable and reusable, the RU-1039 arrives pre-oiled and is ready to install out of the box. It is backed by K&N's 10-Year/Million Mile Limited Warranty and made in the USA - making it a reliable, long-term upgrade for any performance or racing application requiring a round tapered filter with a 3-inch inlet.