Universal Clamp-On Air F ilter-2-7/16in20 DEG FLG

The K&N Engineering Universal Clamp-On Air Filter with 2-7/16 inch 20-degree flange is engineered for builders and enthusiasts seeking flexible intake solutions without permanent modifications to factory airbox housings. This reusable oval filter element measures 4.5 x 3.75 inches across and stands 7 inches tall, making it compatible with numerous custom intake configurations, carburetor setups, and fuel-injected engines where universal fitment is required. Whether you're upgrading a street rod, classic truck, or performance build, this clamp-on design delivers straightforward installation without welding, cutting, or fabrication.

Constructed from K&N's signature reusable cotton media, the filter element captures contaminants while allowing superior airflow compared to standard disposable units, translating to improved throttle response and fuel economy under normal driving. The 20-degree flange orientation accommodates angled intake ducting common in engine bays with space constraints, while the 2-7/16 inch clamp diameter fits standard hose clamps or adapter rings for secure sealing. The oval shape reduces restriction at the intake tract entrance, and the washable design—cleanable with K&N's filter cleaning kit—eliminates recurring filter replacement costs over thousands of miles of service.

This filter excels in custom intake builds, turbo/supercharger manifold applications, and vintage engine restorations where off-the-shelf airbox assemblies don't exist or restrict performance. Mechanics and fabricators appreciate the universal fit approach for one-off projects, prototype testing, and customer vehicles requiring minimal downtime installation. At 0.95 pounds, the lightweight construction reduces unsprung mass while the red filter element provides easy visual inspection of saturation levels. For precise fitment, measure your intake diameter and verify the 20-degree flange angle matches your ducting orientation before ordering.