How often should I clean and re-oil 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 and warranty.

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 its first use. Just install it and you're good to go.

What is the warranty on this air filter?

This K&N air filter is backed by K&N's 10-Year/Million Mile Limited Warranty. This covers defects in materials and workmanship. Be sure to follow the cleaning and maintenance guidelines to keep your warranty valid.

K&N E-3671 Universal Air Filter

Name: K&N Universal Oval Air Filter 12in Length x 5-1/4in Width x 3-1/4in Height
Brand: K&N
SKU: k-n-engineering-k-n-universal-oval-air-filter-12in-length-x-5-1-4in-width-x-3-1--t14-179122
Price: 90.02 USD
Availability: InStock

K&N Universal Oval Air Filter 12in Length x 5-1/4in Width x 3-1/4in Height

$90.02

Only 8 left in stock

Washable, reusable air filter increases airflow and horsepower. Lasts the life of your vehicle.

Key Features

Washable design — can be cleaned and re-oiled
Reusable — lasts the life of your vehicle
Cotton media — traps contaminants
Universal fit — can be adapted to many applications

⚠️ 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!