How often should I clean this filter?

K&N recommends cleaning and re-oiling your filter every 50,000 miles for normal highway use. If you drive in dusty conditions, you may need to clean it more often.

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

You'll want to use K&N filter oil to properly re-oil your filter after cleaning. This oil is specially formulated to work with the cotton media and ensure optimal filtration.

Does this filter come pre-oiled?

Yes, this filter comes pre-oiled and ready to install. You don't need to oil it before its first use.

K&N E-3730 Round Air Filter

Name: K&N Custom Round Air Filter 14in OD 12in ID 4in Height
Brand: K&N
SKU: k-n-engineering-k-n-custom-round-air-filter-14in-od-12in-id-4in-height-t14-4399086
Price: 72.01 USD
Availability: InStock

K&N Custom Round Air Filter 14in OD 12in ID 4in Height

$72.01

In Stock

Washable and reusable round air filter. Expect improved airflow and filtration.

Key Features

Washable design — can be cleaned and re-oiled
Reusable — lasts the life of your vehicle
Improved airflow — expect a slight increase in horsepower
10-Year/Million Mile Limited Warranty — K&N stands behind their filters

⚠️ 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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Product Details

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!