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

K&N recommends cleaning 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 properly clean and re-oil the filter.

Will this filter void my car's warranty?

Using a K&N air filter will not void your vehicle's warranty. K&N backs this up with a consumer protection pledge. The filter is designed to work within the factory specifications of your vehicle.

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 installation. Just drop it into your factory airbox, and you're good to go.

K&N 33-2075 Drop In Air Filter | 2004-2007 Subaru STi

Name: K&N 04-07 Subaru STi K&N Drop In Air Filter
Brand: K&N
Price: 57.99 USD
Availability: InStock

K&N 04-07 Subaru STi K&N Drop In Air Filter

$57.99

Only 4 left in stock

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

Key Features

Washable and reusable — save money on replacement filters
Oiled cotton media — traps contaminants while improving airflow
Direct drop-in replacement — installs in the factory airbox
Designed for long life — backed by K&N's 10-Year/Million Mile Limited Warranty

⚠️ 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!