How often should I clean and re-oil this filter?

K&N recommends cleaning and re-oiling your filter every 50,000 miles for normal highway use. Depending on your driving conditions, you may need to service it more often. Inspect the filter regularly for excessive dirt or debris.

What type of oil should I use to re-oil this filter?

Use only K&N filter oil to re-oil your air filter. Other oils may damage the filter material or reduce its effectiveness. K&N filter oil is specially formulated to trap dirt and debris while allowing maximum airflow.

Does this filter come pre-oiled?

Yes, this K&N air filter comes pre-oiled from the factory, ready for installation. You do not need to oil it before initial use. However, you will need to re-oil it after cleaning.

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Trusted Since 1957

Est. 1957

K&N Universal Filter Round Tapered 4in FlangeID / 6.625in Base OD / 5.25in Top OD / 9.5in Height

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Specifications

Brand: K&N
Part #: RC-4780
UPC: 024844091369

K&N Universal Filter Round Tapered 4in FlangeID / 6.625in Base OD / 5.25in Top OD / 9.5in Height

Name: K&N Universal Filter Round Tapered 4in FlangeID / 6.625in Base OD / 5.25in Top OD / 9.5in Height
Brand: K&N
Price: 78.99 USD
Availability: InStock

$78.99

Only 5 left in stock

Universal air filter with a tapered shape and 4-inch flange. Washable and reusable.

Key Features

Washable and reusable — clean and re-oil for extended filter life
4-inch flange ID — fits a variety of intake systems
Tapered round shape — provides ample filter surface area in a compact design
Pliable rubber flange — allows secure and flexible mounting

⚠️ 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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Will this fit your vehicle?

Product Details

K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications. Regardless of the angle or offset diameter of the air intake, there is probably a K&N Universal air filter for your equipment. All filters are constructed with ultra-strong molded pliable rubber flanges which absorb vibration and allow for secure attachment and can also be stretched for up to 1/16 of an inch (1.5mm) to fit in-between sizes. K&N universal air filters are washable and reusable.