K&N Filter Universal X Stream Clamp-On 4-1/2in Flange 5-7/8in Base 4-1/2in Top 4-1/2in Height

K&N Filter Universal X Stream Clamp-On 4-1/2in Flange 5-7/8in Base 4-1/2in Top 4-1/2in Height

Marsoni

M251S

$50.39

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

K&N Filter Universal X Stream Clamp-On 4-1/2in Flange 5-7/8in Base 4-1/2in Top 4-1/2in HeightK&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio controlled cars, generators, snowmobiles, tractors, and other applications. Regardless of the angle or offset diameter of the air intake, there is probably a K&N Universal air filter for your equipment. All filters are constructed with ultra strong molded pliable rubber flanges which absorb vibration and allow for secure

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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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I’ve bought this cabin air filter multiple times for my 2018 Honda Civic, and it’s consistently great quality. It fits perfectly and is super easy to install—takes just a few minutes to swap out, and I always do it myself. Way cheaper than going to a shop or dealership. The airflow is smooth, there’s no smell at all, and it keeps the inside of my car feeling clean and fresh. No weird odors, no dust blowing in—just a solid, dependable filter that does its job well. This is the only one I’ll keep buying.

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Reviewed in the United States on May 11, 2025

Verified Purchase

Michael Howard

Omaha, US

★★★★★ 5

Do it mayne

Size: 9.5" x 10.9" x 2.1"

Good quality and fit but find it funny that the instructions with the air flow are on the side. I assume that would be facing out and was annoyed when I tried to close and it didn’t fit. Probably should have read the directions. Still would recommend

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Reviewed in the United States on March 8, 2026

Verified Purchase

Kcfangue

Port Orchard, US

★★★★★ 5

Perfect fit, durable and affordable

Size: 9.5" x 10.9" x 2.1"

Ordered this for our 2023 Honda civic. Great fit, durable and very affordable. Was so easy to pull old one out and replace new one. Will be ordering again.

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Reviewed in the United States on November 3, 2025

Verified Purchase

NY2CO

Omaha, US

★★★★★ 5

Save money by installing yourself

Size: 9.5" x 10.9" x 2.1"

Good price and easy to install in a 2019 Honda CRV. Instructions can be found on YouTube. Much less expensive than having a service center install them.

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Reviewed in the United States on February 14, 2026

Verified Purchase

Customer Review

Port Orchard, US

★★★★★ 4

Always fits and is easy to install

Size: 9.5" x 10.9" x 2.1"

We've bought these for years and they always fit and are easy to install. Easy to see when they are dirty and need to throw away. Embarrassed that we let the car dealership do it for so long. We set on six-month subscribe and save so that we know when to replace it - change it whenever it shows up!

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Reviewed in the United States on September 13, 2023