K&N Replacement Air Filter WRX 2008-21 / STI 2008-2018 / Forester 2008-2019 / Legacy 2003-2019 / Outback 2003-2019 / Crosstrek 2013-2017 / Impreza 2007-2016 | 33-2304

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!

• Designed to increase horsepower
• Washable, reusable, and engineered to last for the life of your vehicle
• Designed to provide high airflow and exceptional filtration
• Engineered to fit easily into your factory air box
• 10-Year/Million Mile Limited Warranty
• Only needs cleaning every 50,000 miles under normal highway driving conditions
• Emissions legal in all 50 States