K&N 3.75 Inch OD 2.438 Inch ID 2 Inch Angled Flange 5 Inch H 3 Inch Top OD Round Tapered Univ

K&N Universal Air Filter - 2.438" ID, 2" Angled Flange, 5" Height

Upgrade engine airflow with the K&N Universal Round Tapered Air Filter (SN-2520). Features a 2.438" ID angled flange, washable cotton media, and high filtration efficiency.

The K&N Universal Round Tapered Clamp-On Air Filter (Part # SN-2520) delivers high airflow and engine protection. Engineered as a performance replacement for stock airboxes and OEM filters, this unit is suitable for tight engine bays or custom setups requiring an angled intake path.

Constructed with layered, oiled cotton gauze filtration media, it traps airborne dust and particulates while maximizing intake airflow. The molded pliable rubber flange absorbs heavy engine vibrations and can stretch up to 1/16 inch (1.5mm) to accommodate minor fitment variations. Fully washable and reusable, this clamp-on filter offers a durable alternative to disposable paper filters.

Best Uses

1. Snowmobiles & Powersports: Replaces stock airboxes on snowmobiles, ATVs, and off-road vehicles for improved throttle response in tight clearance spaces.
2. Custom Intake & Engine Builds: Fits custom intake piping, small-engine carburetor setups, and aftermarket turbocharger inlets requiring a 2.438-inch mounting connection.
3. Racing & Performance Applications: Provides high-volume airflow for go-karts, racing vehicles, and custom generators requiring clean, high-velocity intake air.

Features

1. Angled Flange Design: Features a 2-inch long, 20-degree angled flange (2.438" ID) to route airflow around tight engine clearances.
2. Pliable Molded Rubber Flange: Built with flexible rubber that absorbs vibrations and stretches up to 1/16" (1.5mm) for secure attachment.
3. High-Flow Oiled Cotton Media: Multi-layered oiled cotton gauze maximizes air velocity while filtering dust and contaminants.
4. Washable & Reusable: Designed to be cleaned and re-oiled using K&N filter service kits, eliminating the need for constant paper filter replacements.
5. Clamp-On Installation: Mounts directly onto intake pipes or carburetors with a clamp for easy installation and maintenance.

Benefits

1. Increased Horsepower & Acceleration: High-flow design reduces air restriction, allowing the engine to draw in more air for improved combustion.
2. Long-Term Cost Savings: Reusable construction avoids the recurring expense of replacing disposable OEM paper filters.
3. Superior Engine Protection: Layered oil and cotton filtration media capture harmful debris to safeguard vital engine components.
4. Flexible & Secure Fitment: The pliable flange compensates for slight mounting size discrepancies and dampens engine movement.
5. Space-Saving Geometry: Tapered round shape and 20-degree angle allow fitment in tight or custom-configured engine bays.