K&N Replacement Air Filter - Round Tapered - Universal 5.75in Base OD x 5.938in Top OD x 7.688in H

K&N Replacement Air Filter - Round Tapered - Universal 5.75in Base OD x 5.938in Top OD x 7.688in H

Marsoni

M251S

$104.99

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

K&N Replacement Air Filter - Round Tapered - Universal 5.75in Base OD x 5.938in Top OD x 7.688in HThe K&N E 9289 Air Filter is designed to increase horsepower and protect your engine by reducing restriction and providing excellent filtration. The E 9289 custom air filter is manufactured to replace the air filter in the 57S 4000 performance air box and it comes with a K&N embossed lid cap. The filter media can be washed and reused repeatedly. Technical Bulletin This Part Fits: Year Make Model Submodel 2016 2017 Ford Focus RS 2013 2015 Ford Focus S

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Bought three of these for my home office. Two for Synology NAS drives and one for a Mac Studio. The size ranges make this the perfect product to get everything off my desk. A little difficult to install with the desk upright so I suggest turning it on its side or over completely. In my case, I have these in sit stand desks which is great.

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Reviewed in the United States on December 24, 2025

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William Lech

West Palm Beach, US

★★★★★ 4

Decent bracket, Non-beveled screw holes cause complications

The screws that secure the mount to the underside of the desk stick out enough to cause the inner dimensions to change. I had to use the next hole down to increase the size of the bracket to accommodate my device, resulting in a less secure mount than desired. If the holes were beveled so that the screws fit more flush with the mount I'd be able to give it 5 stars. But the inner dimensions are not entirely as advertised due to the screws. Quality is up to standard otherwise, installation is relatively straightforward, price point is fine for a bracket of this size.

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Reviewed in the United States on September 18, 2025

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Kris

Cuba, US

★★★★★ 5

Great mount!

Great under desk NAS mount. Adjustable and sturdy, easy to install. Worked well for my Qnap TR-004 four slot DAS. I used 5/64 drill bit for the holes. Since my desk has a rear lip I reused rear stopper bit as a headphone hanger. I bend it slightly to a hook shape.

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Reviewed in the United States on May 6, 2025

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Brian

Alexandria, US

★★★★★ 5

Tucks my NAS away

Sturdy and a major space saver. Worth the money to free up valuable desk space. Held my 6 bay QNAO NAS perfectly. Highly recommend.

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Reviewed in the United States on November 28, 2025

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Christopher Shaw