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. Use a K&N filter cleaning kit to maintain the filter's performance.

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 your factory airbox, and you're good to go.

What kind of warranty does this filter have?

This K&N air filter is backed by K&N's 10-Year/Million Mile Limited Warranty. This means K&N will replace the filter if it's defective in materials or workmanship. Keep in mind that the warranty does not cover improper cleaning or installation.

K&N E-3952 Air Filter — 6.75x4.5x2.5 inch

Name: K&N Custom Air Filter - Rectangular - 6.75in O/S Length x 4.5in O/S Width x 2.5in Height
Brand: K&N
SKU: k-n-engineering-k-n-custom-air-filter-rectangular-6-75in-o-s-length-x-4-5in-o-s--t14-306616
Price: 59.15 USD
Availability: InStock

K&N Custom Air Filter - Rectangular - 6.75in O/S Length x 4.5in O/S Width x 2.5in Height

$59.15

In Stock

Washable and reusable air filter. Designed to improve airflow and performance.

Key Features

Washable — can be cleaned and re-oiled
Reusable — lasts the life of the vehicle
Oiled cotton media — captures contaminants
Drop-in replacement — fits in the factory air box

⚠️ 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!