


K&N 04-07 Subaru STi K&N Drop In Air Filter
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
K&N 04-07 Subaru STi K&N 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
Quick Dispatch:
Your K&N 04-07 Subaru STi K&N Drop In Air Filter orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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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.
- To process your return/exchange, please contact us at [email protected]
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Product Reviews
★★★★★ 1
Doesn't fit crv hybrid 2023
The engine filter doesn't fit my Honda crv hybrid 2023
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Reviewed in the United States on May 26, 2025
★★★★★ 5
Power steering leak
Worked great. No problem at all.
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Reviewed in the United States on January 16, 2026
★★★★★ 5
perfect fit for 2005 acura rsx s-type
Why did you pick this product vs others?:
fixed my PS pump leak fast.
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Reviewed in the United States on July 7, 2025
★★★★★ 5
So good. No more whine!
Worked like a charm on a 2007 & 2009 Accord 4cyl
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Reviewed in the United States on December 18, 2025
★★★★★ 4
No instructions
No instructions... No idea which one is the high pressure side.They seem to be good quality but I have not used them yet...
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Reviewed in the United States on December 3, 2025