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 regularly and cleaning it when you see a buildup of dirt and debris. In normal conditions, cleaning every 50,000 miles is typical, but more frequent cleaning may be needed in dusty environments.

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

Use only K&N air filter oil to re-oil your filter. Other oils may damage the cotton fibers or reduce the filter's ability to capture dirt. K&N air filter oil is specially formulated to work with the filter's cotton media.

Does this filter come pre-oiled?

Yes, this K&N air filter comes pre-oiled and ready to install. You do not need to oil it before initial use. Just install it and you're good to go.

K&N E-3504 Universal Air Filter — Oval Shape

Name: K&N Universal Custom Air Filter - Oval Shape 11.5in Outer Length / 8.125in Outer Width / 4in Height
Brand: K&N
SKU: k-n-engineering-k-n-universal-custom-air-filter-oval-shape-11-5in-outer-length-8-t14-173622
Price: 90.02 USD
Availability: BackOrder

K&N Universal Custom Air Filter - Oval Shape 11.5in Outer Length / 8.125in Outer Width / 4in Height

$90.02

On Backorder

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

Washable and reusable universal air filter. Designed to improve airflow and increase horsepower.

Key Features

Washable — clean and re-oil for extended use
Reusable — lasts the life of your vehicle
High-flow design — improved airflow over stock paper filters
Cotton media — captures more dirt than paper filters
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!