K&N Custom Air Filter - Round 6.25in OD 5.25in ID 3.25in H

K&N Custom Air Filter - Round 6.25in OD 5.25in ID 3.25in H

Marsoni

M251S

$83.99

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

K&N Custom Air Filter - Round 6.25in OD 5.25in ID 3.25in HK&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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The quality of these is very good. They break the wind very well. Too well, actually. On my bike when going above 60 MPH they press hard enough on the clutch to be a problem. I'm sure I'll still use them but they won't be of any value on the interstate. It's possible to hold the clutch while using them but, for me at least, I don't have the strength to do it for my 45 minute commute. Unfortunately, the openings seem to fold up making it difficult to get gloved hands into them quickly, which is my reason for subtracting a star.

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Reviewed in the United States on November 12, 2025

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Fabian

Alexandria, US

★★★★★ 5

Sedan

Size: Compatible with 2002-2006 BMW E46 3-Series Sedan, Color: Chrome, Size: Compatible with 2002-2006 BMW E46 3-Series Sedan, Color: Chrome

Perfect fit for a 2002 325i sedan, locks in place and does not fall out.

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Reviewed in the United States on March 4, 2026

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Charles Livingston

Port Orchard, US

★★★★★ 5

Perfect fit

Size: Compatible with 2002-2006 BMW E46 3-Series Sedan, Color: Glossy Black

Perfect fit for the 2004 E46 BMW.

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Reviewed in the United States on October 20, 2025

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Lake Worth, US

★★★★★ 4

Price

Size: Compatible with 2002-2006 BMW E46 3-Series Sedan, Color: Glossy Black M-Color Dual Line

I installed this on an e46 325ix sedan, they only worked, one of them is just a little loose. I don't know how long they last, because every time I open the bonnet, the lever bothers me a little?

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Reviewed in the United States on March 19, 2023

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Xavier Melendez

Chelsea, US

★★★★★ 1

Not proper size

Size: Compatible with 2002-2006 BMW E46 3-Series Sedan, Color: Glossy Black, Size: Compatible with 2002-2006 BMW E46 3-Series Sedan, Color: Glossy Black

Driver side is smaller and every time I open the hood it fall down. I have to bend the lever to open the hood to install it. It look good but I’m not happy with it and I’m scared ti drop it while I’m driving. I have to check on it every where I go to be sure didn’t fall

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Reviewed in the United States on April 4, 2023