Universal Clamp-On Filte

The K&N Engineering Universal Clamp-On Filter (RE-0920) is a high-performance air intake element designed for mechanics and automotive enthusiasts seeking improved engine breathing without permanent vehicle modification. Unlike factory paper filters that restrict airflow and demand frequent replacement, this reusable cotton construction delivers sustained performance gains across a wide range of engine sizes and configurations. The universal clamp-on design makes it an ideal retrofit solution for custom air box builds, engine swaps, and cold-air intake systems where OEM filter housings aren't available or practical.

The conical geometry with a 6-inch base and 4.625-inch top diameter maximizes surface area for unrestricted airflow while the 9-inch height accommodates most intake ducting configurations. Red oiled cotton media traps contaminants efficiently while allowing significantly higher volumetric flow than disposable alternatives, translating to measurable gains in responsiveness and power delivery. The 3.5-inch flange provides secure mounting via standard hose clamps, and the reusable design means you simply clean and re-oil the filter using K&N's service kit rather than purchasing replacements—a cost-effective choice for high-mileage or frequently-driven vehicles.

This universal clamp-on filter benefits street rod builders, turbocharged engine developers, and anyone running custom intake manifolds or aftermarket air box solutions where standardized OEM filters don't fit. Installation is straightforward: secure the filter to your intake duct using hose clamps—no drilling, gluing, or permanent modifications required. Its compact 6.5 x 6.5 x 11-inch footprint fits tight engine bays, while the proven K&N cotton media formula ensures reliable filtration without compromising airflow. Compatible with any intake system using a conical filter element and clamp-style mounting, this durable, long-life filter is essential for modified builds.