K&N High-Flow Universal Clamp-On Air Filter RU-1044 — 6" Flange, 8" Height, Washable Reusable

The K&N RU-1044 is a clamp-on, round tapered high-flow air filter with a 6-inch flange and 8-inch height designed to be washable, reusable, and built to last the life of your vehicle.

This universal clamp-on filter from K&N pairs washable, multi-layer cotton filtration with a pliable molded rubber flange so you can improve airflow without frequent replacements. The RU-1044 fits a wide range of aftermarket and custom intake setups where a 6-inch flange and tapered cone shape are required. Pre-oiled and ready to install, it aims to deliver better breathing for engines while reducing waste from disposable filters.

How does this filter increase engine airflow and performance?

The RU-1044 uses four layers of premium cotton gauze treated with a tackifying agent to create a fine, high-flow media that balances increased air delivery and filtration efficiency. Increased airflow can support better throttle response and may help horsepower depending on your engine and setup.

• Four-layer cotton gauze media engineered for high airflow
• Open, tapered cone shape reduces intake restriction
• Pre-oiled for immediate protection and optimal air passage

How do I install and maintain the K&N RU-1044?

Installation is straightforward: clamp the filter to any compatible 6-inch flange or tube using the built-in pliable rubber flange to absorb vibration and seal the connection. Maintenance is simple — clean and re-oil the filter instead of replacing it, cutting long-term costs and waste.

• Clamp-on design with a 0.625" flange length for secure attachment
• Pre-oiled out of the box; drop in or clamp on to compatible intakes
• Clean roughly every 75,000 miles under normal highway driving; follow K&N cleaning kit instructions

What materials and warranty back this filter?

The RU-1044 is built from durable materials: multi-layer cotton gauze media, a specially treated tacking agent, and a molded rubber flange that resists deformation. K&N manufactures these filters in the USA and offers a 1-year limited warranty for peace of mind.

• Durable molded rubber flange for vibration absorption and sealing
• Premium construction with multiple protection layers to trap contaminants
• Made in the USA and covered by a 1-year limited warranty

Who is this for? The K&N RU-1044 is aimed at vehicle owners, custom intake builders, and performance enthusiasts who need a reusable, clamp-on cone filter with a 6" flange and 8" height. It works well for cars, trucks, motorcycles, and custom projects where a universal, high-flow solution is preferred over disposable filters. If you want a long-lasting, washable filter to reduce ongoing filter costs and landfill waste while helping your engine breathe more freely, this model is a practical choice. Follow K&N’s maintenance guidelines for the best balance of airflow and filtration over the filter’s lifetime.