K&N 05 WRX / 99-06 Impreza / 99-04 Legacy Drop In Air Filter

K&N 05 WRX / 99-06 Impreza / 99-04 Legacy Drop In Air Filter

Marsoni

M251S

$67.96

Get it in 3 business days with 1 day shipping. Friday, May 29

K&N 05 WRX / 99-06 Impreza / 99-04 Legacy Drop In Air FilterK&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

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Exchange/Return Notes

We offer a 30-day return/exchange service after receiving.
Final sale items are not eligible for returns or exchanges.
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This is a great filter for allergies and a huge help during allergy season. It traps fine dust and pollen much better than the standard paper filters you get from the dealership, resulting in noticeably cleaner air inside the cabin. The construction feels very solid, and it fit perfectly right into the housing without any issues. If you are looking for true HEPA filtration in your vehicle, this is definitely worth the upgrade!

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Reviewed in the United States on March 13, 2026