K&N High-Flow Universal Clamp-On Air Filter RU-3580 — 3" Flange, 5" Height, Washable Reusable Performance

The K&N High-Flow Original RU-3580 is a washable, reusable universal clamp-on air filter designed to boost airflow and last the life of your vehicle.

This tapered, round clamp-on filter fits applications requiring a 3-inch flange diameter and 5-inch overall height, delivering improved airflow with durable construction and easy maintenance. Built with multiple layers of premium cotton gauze and a pliable rubber flange, the RU-3580 is engineered for secure mounting, vibration absorption, and long-term performance without frequent replacements.

How does this clamp-on filter improve engine breathing?

The RU-3580 uses layered, oiled cotton gauze that allows more air to pass through than typical disposable paper elements while still trapping contaminants. The increased airflow can help engines respond quicker under acceleration and maintain stable performance.

• Multi-layer cotton gauze media for higher air throughput
• Special tack treatment to capture dust and debris
• Pre-oiled and race-inspired design to balance flow and filtration
• Designed to reduce restriction compared to standard paper filters

Will this universal filter fit my intake or custom setup?

Yes — the RU-3580 is a clamp-on style made for a wide range of applications that accept a 3" flange diameter and need approximately 5" height. The rubber flange is pliable to accommodate minor fitment variations and clamp mounting.

• 3-inch molded rubber flange for clamp attachment
• 1.75-inch flange length to seat on varied inlet tubes
• Tapered round shape for space-constrained installations
• Works with many aftermarket intakes, custom piping, and replacement needs

How often do I need to clean and maintain it?

K&N filters are designed to be cleaned and re-oiled at long intervals, not replaced. Under normal highway driving this filter typically only needs service every 75,000 miles or about every five years based on average driving, though dusty conditions require earlier attention.

• Clean roughly every 75,000 miles in standard driving conditions
• Inspect more frequently in dusty or off-road environments
• Use K&N cleaning and oiling kit for best results
• Reusability reduces landfill waste and long-term cost

What are the construction and warranty details?

The RU-3580 is made in the USA using tough molded rubber flanges and multi-layer cotton media for durability. It comes pre-oiled, ready to install, and includes a limited warranty for peace of mind.

• Durable molded pliable rubber flange to absorb vibration
• Four layers of treated cotton gauze for filtration strength
• Pre-oiled for immediate installation and performance
• 1-Year Limited Warranty and made in the USA

Who is this for: The K&N RU-3580 clamp-on air filter is aimed at car and motorcycle owners, performance enthusiasts, and custom builders who want a long-lasting, washable intake filter that improves airflow without frequent replacements. It's especially useful for projects needing a 3-inch flange and compact 5-inch height where a reliable, reusable filtration solution is preferred over disposable paper filters.