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

K&N recommends cleaning and re-oiling your air filter every 50,000 miles for normal highway use. If you drive in dusty or off-road conditions, you may need to clean and re-oil it more frequently. Proper maintenance ensures optimal performance and longevity of the filter.

What is included in the K&N Million Mile Limited Warranty?

K&N's Million Mile Limited Warranty covers defects in materials and workmanship for one million miles or ten years. The warranty applies to the original purchaser and is non-transferable. See the manufacturer's website for full details.

Do I need to purchase any special cleaning or oiling products for this filter?

Yes, you'll need a K&N air filter cleaning kit, which includes both the cleaner and the oil. Using the correct K&N products ensures proper cleaning and re-oiling, maintaining the filter's performance and preventing damage.

K&N E-3390 Air Filter

Name: K&N 7in od 5-3/16inid 3-3/4in h
Brand: K&N
SKU: k-n-engineering-k-n-7in-od-5-3-16inid-3-3-4in-h-t14-897153
Price: 47.14 USD
Availability: BackOrder

K&N 7in od 5-3/16inid 3-3/4in h

$47.14

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Improved airflow and filtration in a drop-in replacement. Washable and reusable.

Key Features

Washable and reusable — clean and re-oil for extended use
Oiled cotton media — improved airflow and filtration
Drop-in replacement — installs in the factory air box
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!