Hilborn Filter 2 1/4 Each

The Hilborn Filter 2 1/4 Each from K AND N ENGINEERING is a premium reusable air filter element engineered for high-performance automotive applications where traditional disposable filters fall short. Designed as a clamp-on, universal-fit solution, this filter serves builders, mechanics, and enthusiasts who demand reliable intake filtration across diverse engine builds and custom applications. Whether you're assembling a street rod, tuning a vintage cruiser, or optimizing airflow on a modified engine platform, this cotton-based filter element delivers the durability and efficiency expected from K&N's proven engineering.

At 9 inches by 5.5 inches in the oval configuration with a 6.25-inch height, the Hilborn Filter 2 1/4 Each accommodates the dual 2.25-inch flanges that define standard Hilborn carburetor air intake systems. The reusable cotton construction allows multiple service intervals—cleanable and re-oiled rather than discarded—making it a cost-effective choice over the vehicle's lifetime. K&N's pleated cotton design maximizes surface area for efficient particle capture while maintaining low restriction, a critical balance that preserves engine breathing characteristics and throttle response. The bright red finish aids visibility during installation and maintenance, while the robust construction withstands vibration and temperature cycling inherent to performance driving.

This filter is ideal for hot-rodders, engine builders, and restoration enthusiasts working with carburetor-equipped engines where compact, direct-mount filtration is required. The universal clamp-on design ensures compatibility across multiple intake configurations, though fitment should always be verified against your specific carburetor and air-cleaner assembly geometry. Installation is straightforward—secure the dual flanges with hose clamps and connect your air intake ducting. For best performance longevity, service the filter according to K&N specifications: clean when visibly soiled and apply K&N filter oil to restore flow characteristics. Weighing just 1.85 pounds, it adds negligible mass while supporting reliable engine protection in street and strip applications.