K&N RU-3120 Universal Clamp-On Round Tapered Filter 2.75in 10Deg Flange 4in OD

Vehicle Fitment

• Universal Fit - Designed for motorcycles, ATVs, powersports vehicles, racing builds, and any application with a 2.75 in. intake requiring a compact clamp-on tapered filter with an angled flange

Fitment Notes

• This filter features a 10-degree angled flange - designed for offset or angled intake configurations where a straight flange will not seat properly
• Verify your intake tube outside diameter matches the flange inside diameter of 2.75 in. before purchasing
• Rubber flange can be stretched up to 1/16 in. (1.5 mm) to accommodate in-between sizes
• Not a direct OEM replacement for a specific vehicle - confirm fitment by measuring your intake tube diameter and angle

Features

• Multi-layer oiled cotton gauze media delivers up to 50% more airflow than standard paper filters
• 10-degree angled flange engineered for offset and angled intake applications
• Compact round tapered (cone) profile - 4 in. base OD, 2 in. top OD, 6 in. height
• 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
• Made in the USA
• Backed by K&N's 10-Year/Million Mile Limited Warranty

Specifications

• Shape: Round Tapered (Cone)
• Flange Inside Diameter: 2.75 in. (70 mm)
• Flange Angle: 10 degrees
• Flange Length: 1.00 in. (25 mm)
• Flange Type: Centered (Single)
• Base Outside Diameter: 4.00 in. (102 mm)
• Top Outside Diameter: 2.00 in. (51 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-3120 Universal Clamp-On Round Tapered Air Filter

Product Description

The K&N RU-3120 is a high-flow universal clamp-on round tapered air filter specifically engineered for offset and angled intake applications. Its 10-degree angled flange allows it to seat correctly on intake tubes that are positioned at an angle where a standard straight-flange filter would not align properly - making it an ideal solution for motorcycles, ATVs, scooters, and custom builds with compact or angled carburetor and intake positioning. The multi-layer oiled cotton gauze construction flows significantly more air than stock paper elements, delivering improved throttle response and horsepower gains in a very compact package.

The 2.75 in. rubber flange mounts securely onto matching intake tubes and absorbs vibration for a rattle-free installation. Its small footprint - 4 inches at the base tapering aggressively to just 2 inches at the top - makes it well-suited for tight engine bays or fairings where clearance is limited. Washable and reusable, the RU-3120 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.