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

The cleaning interval depends on your driving conditions. K&N recommends inspecting the filter regularly and cleaning it when you see a buildup of dirt and debris. A typical cleaning interval is every 25,000 to 50,000 miles.

What kind of oil should I use to re-oil the filter?

Use K&N filter oil to ensure proper filtration and prevent damage to the filter. Other oils may not provide adequate filtration or could damage the cotton fibers.

Does this filter come pre-oiled?

Yes, this K&N air filter comes pre-oiled and ready to install. You don't need to oil it before the initial installation. Just drop it in and go.

K&N Custom Air Filter Round 5.25 inch ID 6.25 inch OD 2.5 inch Height

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K&N Engineering

K&N Custom Air Filter Round 5.25 inch ID 6.25 inch OD 2.5 inch Height

Name: K&N Custom Air Filter Round 5.25 inch ID 6.25 inch OD 2.5 inch Height
Brand: K&N Engineering
Price: 52.99 USD
Availability: InStock

$52.99

Cleanable, reusable air filter that drops into your factory air box. Expect improved airflow and filtration.

Key Features

Washable — clean and re-oil for extended use
Reusable — lasts the life of your vehicle
High-flow design — improved airflow over stock paper filters
Oiled cotton media — captures contaminants

⚠️ 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

Fits these vehicles

Alfa Romeo Spider 1979-1980
Ford Cortina 1965-1966

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Since 1957

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Product Details

K&N's replacement High-Flow Air Filters are designed to increase horsepower while providing exceptional engine protection, and are covered by K&N's No-Hassle Lifetime Limited Warranty.
6-1/4in.OD;5-1/4in.ID;2-1/2in.H

K&N washable, reusable High-Flow Air Filters feature a state-of-the-art design of layered, oiled cotton media engineered to improve airflow and capture contaminants, and are designed to provide an increase in horsepower. Each performance air filter is reusable, engineered to last for the entire lifespan of your vehicle, and backed by K&N's 10-Year/Million Mile Limited Warranty. K&N drop-in replacement filters are designed to install easily into your factory air box. Upgrade today and start enjoying superior airflow and superior performance from K&N's most popular product!K&N washable, reusable High-Flow Air Filters feature a state-of-the-art design of layered, oiled cotton media engineered to improve airflow and capture contaminants, and are designed to provide an increase in horsepower. Each performance air filter is reusable, engineered to last for the entire lifespan of your vehicle, and backed by K&N's No-Hassle Lifetime Limited Warranty. K&N drop-in replacement filters are designed to install easily into your factory air box. Upgrade today and start enjoying superior airflow and superior performance from K&N's most popular product!