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

The cleaning interval depends on your driving conditions. K&N recommends inspecting the filter every 25,000 miles and cleaning it when you see a buildup of dirt and debris. Off-road driving requires more frequent cleaning.

What kind of oil should I use to re-oil my K&N air filter?

You should only use K&N filter oil to re-oil your air filter. Other oils can damage the cotton fibers and reduce the filter's effectiveness. K&N filter oil is specially formulated to work with the cotton media and maintain optimal airflow.

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 your first use. Just install it in your factory air box.

K&N E-3344 Round Air Filter

Name: K&N Custom Air Filter - Round 6.25in OD 5.25in ID 4in H
Brand: K&N
SKU: k-n-engineering-k-n-custom-air-filter-round-6-25in-od-5-25in-id-4in-h-t14-372241
Price: 59.15 USD
Availability: BackOrder

K&N Custom Air Filter - Round 6.25in OD 5.25in ID 4in H

$59.15

On Backorder

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

Washable, reusable air filter improves airflow and traps contaminants. Expect increased horsepower.

Key Features

Washable and reusable — clean and re-oil for extended use
Oiled cotton media — traps contaminants better than paper filters
Designed to increase horsepower — improved airflow over stock
Direct drop-in replacement — fits in the factory air box
Backed by K&N's lifetime warranty — covers defects in materials and workmanship

⚠️ 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!