K&N RU-1780 Universal Clamp-On Round Air Filter 2.06in 17-Degree Flange 3.5in OD

Vehicle Fitment

• Universal Fit - Designed for motorcycles, ATVs, powersports vehicles, racing builds, and any application with a 2.0625 in. intake tube requiring a clamp-on air filter with an angled flange

Fitment Notes

• This filter features a 17-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 2.0625 in. before purchasing
• Rubber flange can be stretched up to 1/16 in. (1.5 mm) to accommodate in-between sizes
• When used as a carburetor replacement filter, jetting modifications may be required due to increased airflow
• 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
• 17-degree angled flange designed for offset and angled intake applications
• Round straight design provides consistent filter surface area across the full 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 Straight
• Flange Inside Diameter: 2.0625 in. (52 mm)
• Flange Angle: 17 degrees
• Flange Length: 2.50 in. (64 mm)
• Flange Type: Centered (Single)
• Outside Diameter: 3.50 in. (89 mm)
• Height: 5.00 in. (127 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-1780 Universal Clamp-On Round Air Filter

Product Description

The K&N RU-1780 is a high-flow universal clamp-on round air filter specifically engineered for offset and angled intake applications. Its 17-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, and custom builds with tight or non-vertical carburetor or intake positioning. The multi-layer oiled cotton gauze construction flows significantly more air than stock paper elements, delivering improved throttle response and horsepower gains.

The 2.0625 in. rubber flange mounts securely onto matching intake tubes and absorbs vibration for a rattle-free installation. Note that when replacing a carburetor's stock air filter, jet size adjustments may be necessary due to the increased airflow. Washable and reusable, the RU-1780 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 the correct choice for any build requiring an angled clamp-on round filter of these dimensions.