K&N Custom Racing Air Filter - Rectangular Carbon Fiber 4in Air Box w/ 2.75in Air Horn

K&N Custom Racing Air Filter - Rectangular Carbon Fiber 4in Air Box w/ 2.75in Air Horn

Marsoni

M251S

$472.50

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

K&N Custom Racing Air Filter - Rectangular Carbon Fiber 4in Air Box w/ 2.75in Air HornLight weight yet durable, K&N's Generation 2 Carbon Fiber Air Boxes are a must for any racer currently using traditional multi Siamese stacks. Constructed from ultra lightweight carbon fiber these filters provide ample air flow for your racing needs. They come with air horn seals to provide better sealing and easy installation. As with all K&N air filters, Generation 2 Carbon Fiber Air Boxes are washable and reusable. Simply use K&N cleaner and oil to

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I got this for a trailer not a truck and it works perfectly for dump runs instead of using a tarp and bungies. Comes in a little bag I'll never use again and had some accessories i don't understand, but if you want a springy net for something that's cheap enough not to care about breaking this is your product

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Reviewed in the United States on September 7, 2025

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Theresa Laskowsky

Draper, US

★★★★★ 5

Its good

It works, just doesn't hold well when the inside of car is hot

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Reviewed in the United States on April 11, 2026

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Robert

Boise, US

★★★★★ 1

work as it was intended to

the first time I attached it fell off with in an hour. i didn't even have my phone mount it. i try s second time only lasted 20 minutes. the last time i tried it only lasted a few minutes

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Reviewed in the United States on April 21, 2026

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Vanessa

Draper, US

★★★★★ 5

Exceeds my expectations!!

Great product design, very versatile with an incredible magnetic. Worth its weight in gold. Works perfectly as described, actually surpasses my expectations. I sail and have placed this by my helm for my device, which I use for navigation and other purposes. Despite encountering severe weather conditions, it has never failed me. I’ll be ordering more of these in the future for my other devices and as gifts.

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Reviewed in the United States on April 27, 2026

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Sherron J Badour

Carnegie, US

★★★★★ 5

Hands-free video watching

Handy tool especially while I am working at this computer. I can work and watch a video at the same time. Tool holds it tight with a strong magnet. (Turned my phone around for the pic for privacy)

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Reviewed in the United States on April 25, 2026