


K&N Audi A4 1.8L Drop In Air Filter
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
K&N Audi A4 1.8L 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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Your K&N Audi A4 1.8L 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]
- Please click here for more details>>> Return & Exchange Policy
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Product Reviews
★★★★★ 5
happy engine. good mileage
Color: CA9683
Fit my 05 Tacoma great! Have had good response with the engine and it's acceleration. Fuel mileage is back on par. Will buy again!
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Reviewed in the United States on October 18, 2025
★★★★★ 5
Kax brand
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Perfect for my 07 FJ! Looks of great quality over fram low end...
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Reviewed in the United States on December 22, 2025
★★★★★ 5
Is it to install looks better
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Pitch Perfect, seems like it breathed better
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Reviewed in the United States on April 22, 2026
★★★★★ 5
Es de buena calidad
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Muy buena calidad
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Reviewed in the United States on January 30, 2026
★★★★★ 5
Save on filters forever
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A perfect replacement for my auto' expensive paper filter. With a little care it will outlast the car
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Reviewed in the United States on September 18, 2025