How often should I clean and re-oil my K&N air filter?

The cleaning frequency depends on your driving conditions. In normal conditions, clean the filter every 50,000 miles. If you drive in dusty or off-road conditions, you may need to clean it more often.

What type of oil should I use to re-oil my K&N air filter?

Use only K&N filter oil to re-oil your air filter. Other oils may damage the cotton filter media or reduce its filtration efficiency. K&N filter oil is specially formulated to work with the cotton fibers and trap dirt particles.

What is the flange size of this filter?

The K&N RP-4980 has a 4 inch inside flange diameter and a 5/8 inch flange length. Make sure your intake tube matches these dimensions for proper fitment. Using the correct size ensures a secure and airtight connection.

K&N Round Tapered Universal Air Filter 4in Flange ID x 5.375 Base OD x 4in Top OD x 6.5in H

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Specifications

Brand: K&N
Part #: RP-4980
UPC: 024844094476

K&N Round Tapered Universal Air Filter 4in Flange ID x 5.375 Base OD x 4in Top OD x 6.5in H

Name: K&N Round Tapered Universal Air Filter 4in Flange ID x 5.375 Base OD x 4in Top OD x 6.5in H
Brand: K&N
Price: 209.99 USD
Availability: InStock

$209.99

On Backorder — Expected to ship by Apr 2, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Universal air filter with oiled cotton media and carbon fiber top. Improves airflow and engine performance.

Key Features

Oiled cotton filter media — allows for high airflow with excellent filtration
Washable and reusable — clean and re-oil for extended life
Carbon fiber top — adds strength and reduces weight
Clamp-on design — easy to install on a variety of applications

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Fits these vehicles

Honda S2000 2000-2008
Lexus IS300 2001-2005

Product Details

The RP-4980 Universal Air Filter is constructed from an oiled cotton filter media. It comes with a K&N embossed carbon fiber top for strength and durability. The carbon fiber element adds to the light-weight design and gives this filter a smooth glass like finish. The RP-4980 is a clamp-on filter that has an inside flange diameter of 4 inches and a flange length of 5/8 inches. The base is 5 3/8 inches and the filter height is 6 1/2 inches.