Cathedral Port 5.3L 3.780" (+) Bore - Single Black Label CNC Cylinder Head - Bare

Marsoni

M251S

$915.48

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

Cathedral Port 5.3L 3.780" (+) Bore - Single Black Label CNC Cylinder Head - Bare>Download the cylinder head spec sheet< The Mast Motorsports cylinder head product line is completely manufactured from a raw casting to a finished cylinder head in the USA located in Nacogdoches Texas. Mast refuses to compromise on materials and methods that may jeopardize longevity, performance, and quality. When buying Mast Cylinder heads, you are getting the highest level of quality and performance on the market. Full Send, no compromises, no

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Exchange/Return Notes

We offer a 30-day return/exchange service after receiving.
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I buy a lot from from Amazon and this is my first negative review as this was one of my biggest disappointments. I have bought 7 sets of this Basic pillow in the Standard size over the past 4 years, for my home and my boyfriends, using them both to sleep on and for my pillow shams. I love these pillows and my guests do too, best sleep ever and I have tried a number of expensive pillows prior to this. So when I recently purchased my first king size bed, I bought two sets of the king size pillow of this same brand, and I hate them. They are not the same as the standard size as they are flat, and no matter how much I tried to fluff them up, they fall flat in filling and firmness. After a few restless nights using my new king size pillows, I used the standard pillows I purchased in the past and there is definitely a difference. I see where there are different reviews/opinions on this, but this has been my experience. I will be complaining to Amazon, though not sure there is anything they can do since I used them.

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Reviewed in the United States on August 13, 2025

Verified Purchase

Laurie S.

Cuba, US

★★★★★ 3

Ok, not as good as before, put in dryer to fluff!

Color: Grey, Size: Standard (Pack of 2)

I have ordered these a few times in the past and loved them. This time they came rolled up and vacuum sealed. Doing that made the pillows flat and feel worn out. I was going to return them, but read that putting them in the dryer on low heat for about 15 minutes helps fluff them. I did that and it definitely improved the pillows. I'll keep them, but they're def not as good as they were a few years ago.

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Reviewed in the United States on March 1, 2026