K&N High-Flow Universal Clamp-On Air Filter RG-1001BL — 4" Flange, 5.5" Height, Washable

Designed for a wide range of applications, this clamp-on air filter from K&N uses layered cotton gauze media and a tapered round shape to balance airflow and particulate capture. Unlike disposable paper filters, the RG-1001BL is pre-oiled, serviceable, and constructed with a pliable molded rubber flange to ensure a secure seal and vibration absorption where fitment varies. The result is a versatile, low-waste filtration option for aftermarket and custom installations.

How does this filter improve airflow without frequent replacements?

The RG-1001BL employs four layers of premium cotton gauze treated with a tackifying agent to create a dense, multi-stage media that passes more air while trapping contaminants. Because the filter is washable and re-oilable, it eliminates the recurring cost and waste of disposable filters. Routine cleaning restores flow characteristics instead of buying new units.

• Pre-oiled and ready to install for immediate performance.
• Four layers of charged cotton gauze for airflow plus filtration.
• Clean only every 75,000 miles under normal highway driving conditions.
• Reusable design reduces landfill waste and replacement costs.

Will this clamp-on design fit my intake or custom setup?

This model is a universal clamp-on filter targeted at many aftermarket and custom intake scenarios; the pliable molded rubber flange helps accommodate minor variations in attachment and angle. The tapered round shape gives space efficiency for compact engine bays and flexible routing. Verify compatibility by measuring your inlet and matching to the flange diameter and length.

• Flange diameter: 4.00 inches (for clamp-on connection).
• Flange length: 1.125 inches to help secure hose attachments.
• Filter height: 5.5 inches, tapered round body for compact fits.
• Universal fitment suits a wide range of applications and shapes.

What maintenance and service intervals should I plan for?

K&N engineered these filters for long service intervals; under normal highway driving the media typically only needs a cleaning every 75,000 miles (roughly five years at average annual mileage). When you do service it, use K&N cleaning products or equivalent procedures to preserve the media and tackifying treatment. Proper cleaning and re-oiling restore filtration and maintain the expected airflow behavior.

• Suggested service interval: every 75,000 miles under normal highway use.
• Wash, let dry fully, then reapply filter oil per instructions.
• Inspect flange and clamp area for secure mounting each service.
• Use recommended cleaners and oils to retain performance.

Who is this for? The K&N RG-1001BL clamp-on air filter is aimed at car and motorcycle owners, hobbyists, and mechanics who want a durable, serviceable upgrade for custom or aftermarket intakes. It's a practical choice for anyone seeking improved airflow, fewer disposable replacements, and a filter that adapts to varying fitment needs thanks to its molded rubber flange and universal clamp-on design. Ideal for compact installations where a tapered, round profile and a 4" clamp connection are required.