How often should I clean my K&N air 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 air filter require oiling?

Yes, this K&N air filter uses an oiled cotton gauze design to trap dirt and debris. The oil helps to improve filtration and airflow. Make sure to use genuine K&N filter oil when servicing the filter to maintain its effectiveness.

Is this filter CARB-legal in California?

K&N filters like this one are street legal in all 50 US states. They meet emissions standards while improving engine performance. No modifications are needed to install this filter.

K&N Air Filter 33-2232 | Subaru WRX/STi 2002-2007

Name: K&N 02-07 WRX/STi Drop In Air Filter 11in O/S Length / 6.563in O/S Width / 1.063in Height
Brand: K&N
Price: 68.99 USD
Availability: InStock

K&N 02-07 WRX/STi Drop In Air Filter 11in O/S Length / 6.563in O/S Width / 1.063in Height

$68.99

Only 4 left in stock

Drop-in replacement air filter improves airflow. Washable and reusable.

Key Features

Washable air filter — can be used for the life of your vehicle
Designed to increase horsepower — improved airflow over stock paper filters
Drop-in replacement — installs in the factory air box
10-Year/Million Mile Limited Warranty — K&N stands behind their product

⚠️ 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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Will this fit your vehicle?

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!