K&N Universal Air Filter 4in Flange / 5-3/8in Base / 4-1/2in Top / 6in Height

K&N Universal Air Filter 4in Flange / 5-3/8in Base / 4-1/2in Top / 6in Height

Marsoni

M251S

$63.19

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

K&N Universal Air Filter 4in Flange / 5-3/8in Base / 4-1/2in Top / 6in HeightSKU: RU 4550 UPC: 024844373809 K&N Universal Air Filter 4in Flange 5 3 8in Base 4 1 2in Top 6in Height RU 4550 The K&N RU 4550 is a universal clamp on air filter designed for racing vehicles radio controlled cars generators snowmobiles tractors and more. It fits applications like 1999 2000 Honda Civic models 2001 2002 BMW 525i 2009 Mazda MX 5 Miata 2002 Mini Cooper S and 2004 Volkswagen Golf GTI VR6. This pre oiled filter increases airflow for higher

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Got these for work (service industry) to reduce issues with psoriasis and blisters while putting on 20k+ steps a day. Over time the wounds healed and I could work without so much pain. I now don't use them all the time like I used to, only when a new lesion or blister appears, too prevent a breakout. Tip: if you're not in full breakout, wear thick socks under these as a barrier to friction.

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Reviewed in the United States on April 28, 2026

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Kim C

Phoenix, US

★★★★★ 4

Work well but run small

Size: 1 pair black L

They do seem to run a bit small. I bought them for my bf but snagged them from him because I couldn’t resist! I’m about a W8/12 and they were just a little big but unlike others, I just put them on while sleeping and didn’t walk around with them. If you’re just planning on that, they did a great job at sloughing and moisturizing 😎

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Reviewed in the United States on April 25, 2026

Verified Purchase

Aaron Duncan

Massapequa, US

★★★★★ 5

Good socks they work.

Size: 2 pairs black L

I normally wear size 13&half to 14 men's, and these fit me ok. They sit just below the ankle. They can get a little tight for me so you should look out for that if you are on the thicker side. But they work as advertised and help moisturize your feet. I recommend wearing them if you're going to just be hanging around home for a bit in one spot as they can be a little slippery to walk in if you go fast. Would not recommend going up and down stairs.

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Reviewed in the United States on August 28, 2025