How often should I clean my K&N air filter?

The cleaning interval depends on your driving conditions. K&N recommends inspecting the filter every 30,000 to 50,000 miles and cleaning it when you see a buildup of dirt and debris.

What do I need to clean and re-oil my K&N air filter?

You'll need a K&N air filter cleaning kit, which includes both the cleaner and the oil. The cleaner removes dirt and grime, and the oil restores the filter's ability to trap contaminants.

Does this filter come pre-oiled?

Yes, this filter comes pre-oiled and ready to install. You only need to oil it after cleaning.

K&N E-3770 Custom Air Filter

Name: K&N Custom Air Filter 14in OD / 12in ID / 6in Height
Brand: K&N
SKU: k-n-engineering-k-n-custom-air-filter-14in-od-12in-id-6in-height-t14-251281
Price: 135.46 USD
Availability: InStock

K&N Custom Air Filter 14in OD / 12in ID / 6in Height

$135.46

In Stock

Washable, reusable design improves airflow and filtration. Expect a slight bump in horsepower.

Key Features

Washable — clean and re-oil for extended use
Reusable — lasts longer than standard paper filters
Oiled cotton media — captures more dirt than dry media
14 inch outer diameter, 12 inch inner diameter, 6 inch height

⚠️ 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!