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

Cleaning depends on your driving conditions. K&N recommends cleaning every 50,000 miles for normal highway use, but more often in dusty conditions. Use a K&N filter cleaning kit to maintain the filter's performance.

What size clamp do I need to install this filter?

This filter has a 3.688 inch flange inner diameter. You'll need a clamp that matches that size to ensure a secure connection to your intake.

Is this filter legal in California?

No, this filter is not CARB-approved. That means it cannot be used on pollution-controlled vehicles in California.

K&N Universal Air Filter - Oval Straight - 3.688in Flange ID x 10.25in Base O/S Length x 7.875in H

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Specifications

Brand: K&N
Part #: RC-5178
UPC: 024844246004

K&N Universal Air Filter - Oval Straight - 3.688in Flange ID x 10.25in Base O/S Length x 7.875in H

Name: K&N Universal Air Filter - Oval Straight - 3.688in Flange ID x 10.25in Base O/S Length x 7.875in H
Brand: K&N
Price: 146.99 USD
Availability: InStock

$146.99

Only 3 left in stock

Universal clamp-on air filter from K&N. Washable and reusable.

Key Features

Washable — clean and re-oil for long life
Reusable — save money compared to disposable filters
Clamp-on design — easy to install on custom intakes

⚠️ 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

Ford Excursion 2003-2005
Ford F-250 Super Duty 2003-2007
Ford F-350 Super Duty 2003-2007

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. This universal air filter has a rigid flange for a clamp-on hose connection. K&N universal air filters are washable and reusable.