★★★★★ 5
Not a hard pillow
Model: Soft-2PK, Size: Standard
So comfortable and soft.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 21, 2026
K&N Filter Universal X Stream Clamp-On 2.438in Flange ID x 4.5in Base OD x 4in Top OD x 6.563in H
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
K&N Filter Universal X Stream Clamp-On 2.438in Flange ID x 4.5in Base OD x 4in Top OD x 6.563in HK&N XStream Top Universal Air Filters take performance to the next level with the addition of a filter within the filter's top adding more filter area for higher air flow and a longer service interval. The XStream Air Filter provides awesome air flow and outstanding filtration. When racing, in any environment, racers need all the protection and airflow they can get. K&N delivers. All K&N universal air filters are constructed with ultra strong molded
Quick Dispatch:
Your K&N Filter Universal X Stream Clamp-On 2.438in Flange ID x 4.5in Base OD x 4in Top OD x 6.563in H orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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You'll receive a tracking link by email once your K&N Filter Universal X Stream Clamp-On 2.438in Flange ID x 4.5in Base OD x 4in Top OD x 6.563in H ships.
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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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Based on 1616 reviews
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Product Reviews
★★★★★ 5
Fluffed to perfection.
Model: Soft-2PK, Size: Queen
I was a tad disappointed when I first opened the vacuum sealed packaging. They were flat and thin and disappointing. Once I fluffed them (took about 15 minutes per pillow) they were suddenly AMAZING. Fluffy and soft and perfectly supportive.
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Reviewed in the United States on February 26, 2026
★★★★★ 3
Ok
Model: Soft-2PK, Size: Queen
These pillows are ok. I would not purchase them again as they go flat, but they will fluff up again once you fluff them.
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Reviewed in the United States on April 23, 2026
★★★★★ 5
Comfort at its best
Model: Soft-2PK, Size: Queen
Excellent pillows! Like sleeping in a high end hotel! Gonna switch all of my beds over.
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Reviewed in the United States on May 28, 2026
★★★★★ 5
Silky, well made, beautifully made and a terrific deal! I highly recommend!
Size: Queen (20" X 30"), Color: 08 - Sage Green - Zipper, Number of Items: 2
I have been buying this type of case for several years, love the zipper enclosure, the softness, the great quality, its a great weight and soft as can be. The queen fits my pillows beautifully!. My hair always is shinier when I sleep on these silky feeling cases.
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Reviewed in the United States on April 2, 2026
