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Frankenstein - M311 273cc LS3 Cylinder Heads (SET)

Marsoni M251S
Sale price$1666.50
Pay 4 payments of $416.62 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
Frankenstein - M311 273cc LS3 Cylinder Heads (SET)M311 273cc LS3 Cylinder Heads Fully CNC ported, Stainless Steel Severe Duty Valves, PAC . 700 Lift Valve Springs, O Ringed Exhaust Ports and Titanium Retainers Fully 5 Axis CNC ported, 68cc chamber volume 273cc intake port, 112cc exhaust port and 11 valve angle If needing to extend your alternator harness connection, use ICT# WEALT30 36 (4 pin) or WEALT40 36 (2 pin) High Quality Components: Black Nitride Stainless Steel Severe Duty Valves Custom PAC .
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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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4.5 ★★★★★
Based on 342 reviews
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Verified Purchase
SHC
Louisville, US
★★★★★ 5
Comfortable and good quality
Color: White, Size: Queen (Pack of 2)
So comfortable! We stayed at an Airbnb that used these pillows and went home and ordered some! These are similar to another more expensive pillow I’ve used but way better price. The filling feels nice and they don’t go flat or get lumpy so far.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 16, 2026
E
Verified Purchase
Emm!
Phoenix, US
★★★★★ 5
A product that will make a difference!
Color: White, Size: King (Pack of 2)
These king-size pillows are incredibly comfortable and supportive. They are soft enough to feel luxurious, yet they provide great support for my head and neck throughout the night. The king size is perfect for a larger bed and gives the bed a full, hotel-like appearance. The pillows keep their shape well and fluff up nicely after use. I've been sleeping much better since getting them and would definitely recommend them to anyone looking for quality, comfortable pillows.
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Reviewed in the United States on June 3, 2026
R
Verified Purchase
Roman P
Bozeman, US
★★★★★ 5
A must have♥️❤️
Color: White, Size: King (Pack of 4)
These pillows are amazing They’re plush and extremely comfortable. I love them.
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Reviewed in the United States on June 9, 2026
M
Verified Purchase
Mimis cake school
New York, US
★★★★★ 5
Finally! Comfy pillows for a😴good night sleep
Color: White, Size: Queen (Pack of 4)
Just wow!! Looking for new pillows that are comfortable & hold their shape. These are it ! I love anything by utopia. And these pillows did not disappoint. Great value. Feels like a high end pillow. As a side sleeper these are a keeper. Highly recommend. And ill be purchasing more!
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Reviewed in the United States on May 18, 2026
J
Verified Purchase
Jennifer Kuhns
Belleville, US
★★★★★ 4
Soft...but fluffy and tall
Color: White, Size: Standard (Pack of 2)
I've only had these pillows for about a week. They are a great quality pillow. The cover is soft and seems well made. My only complaint is that they are VERY full pillows. If you're tall with broader shoulders, you'll probably love them. If you're shorter with a smaller frame you will probably feel like your head is too high and your neck at a weird angle (my problem). There seemed to be mixed reviews about softness....I would consider these a nice medium pillow. Soft filling but firm enough that your head doesn't sink to the bed. Definitely NOT a down-like pillow, so if that's what you're looking for, this is not for you.
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Reviewed in the United States on April 10, 2026

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