How often should I clean 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.

Do I need to oil the filter after cleaning?

Yes, you must re-oil the filter after cleaning to maintain its filtration properties. Use K&N filter oil and apply it evenly to the 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 the initial installation.

K&N Air Filter 33-5092 | 2019 Subaru WRX STI 2.5L

Name: K&N 2019 Subaru WRX STI 2.5L F/I Replacement Air Filter
Brand: K&N
Price: 62.99 USD
Availability: InStock

K&N 2019 Subaru WRX STI 2.5L F/I Replacement Air Filter

$62.99

Only 6 left in stock

Washable and reusable air filter. Designed to improve airflow and performance.

Key Features

Washable — can be cleaned and reused
Oiled cotton gauze — high airflow with excellent filtration
Drop-in replacement — installs in the factory air box

⚠️ 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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Fits this vehicle

Subaru WRX STI 2019-2021

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!