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Description
GM LS2 LS6 Gen III Gen IV Cylinder Head 243 Single Rebuildable Head CoreCondition: USED REBUILDABLE CORE The GM 12564243 Cylinder Head is engineered from high quality aluminum alloy and designed to support Generation III V8 engine applications. It is commonly used in trucks vans SUVs and performance vehicles delivering enhanced combustion efficiency with its cathedral intake port design. Cross referenced across multiple GM LS series applications this cylinder head is noted for durability and precise engineering in
Condition: USED/REBUILDABLE COREThe GM 12564243 Cylinder Head is engineered from high-quality aluminum alloy and designed to support Generation III V8 engine applications. It is commonly used in trucks vans SUVs and performance vehicles delivering enhanced combustion efficiency with its cathedral intake port design. Cross-referenced across multiple GM LS series applications this cylinder head is noted for durability and precise engineering in motorsport and everyday driving conditions.
Part Number: 12564243
Manufacturer: GM
Weight: 52.0000 lbs
Additional Details:
Genuine OEM Parts
Please research/ensure fitment of part to your specific vehicle before purchasing. Returns because of non-fitment are accepted with a re-stocking fee, however customer is responsible for return shipping.
Shipping:
If shipping outside the contiguous 48 states is required, reach out to [email protected] to confirm shipping details.
About Us:
Custard Core Supply provides the highest quality of new, new take off, used, and core parts. We provide a variety of gas and diesel parts to our customers. Based in Dallas, TX Custard Core Supply has been in business since 1998. If you do not see a product you are looking for on our page, please reach out!
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 25 reviews
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Product Reviews
★★★★★ 4
Very thin
Color: White, Size: King (104''x90'')
This is really cute but just beware it’s super super thin. The fabric is soft and it feel breathable but it’s very light and thin
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Reviewed in the United States on January 22, 2026
★★★★★ 5
Lightweight and cozy
Light and comfortable comforter perfect for summer time. Lavender color is lovely and the pattern of the fabric creates a nice texture.
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Reviewed in the United States on April 10, 2026
★★★★★ 5
Comfy for my honey
This is the most prettiest and most comfortable blanket.I've ever bought.I bought the king size cause I need more blanket on my queen's size.It keeps me cool and warm at the same time.Best.Money can buy
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Reviewed in the United States on May 15, 2026
★★★★★ 5
Great pillow that helped relieve my neck pain!
This is probably one of the best, if not the best pillow I have ever used. I have periodically had a stiff neck in the mornings and the past 2 months it was constant. I got these pillows about a week ago and the first night that I tried it, my stiff neck was significantly less in the morning. I tried it for another 4 days and each day my neck felt better. I then visited my sister and used the pillow they had and the next morning my neck had pain again. The following night when I was back home, I used this pillow again and in the morning my neck pain was gone. I was completely surprised that this pillow worked for me, as I have tried many other pillows over the years. My wife, who also has neck pains, said that this pillow also helped her. The retail price is on the expensive side, but to me it is worth it. It comes with 2 queen size pillows that easily fit queen size pillow cases. It also comes with its own zippered cover that is made of a very soft microfiber type of material. The pillows are made of memory foam with portions of it more firm than others so that it can support your neck and head correctly. Depending on how you sleep, the pillow can be flipped or turned to match your sleeping style. I tend to sleep on my back and use the side that cradles your head. It is indicated by the blue portion of the pillow that I show in the pictures. The part that supports my neck is a little stiffer than where my head rests. Not sure if this works for everyone, but for me it is the best pillow I have ever tried, without a doubt!
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Reviewed in the United States on May 25, 2026
★★★★★ 4
Amazing Support and Sleep Quality… But the Price Is Hard to Justify
These pillows genuinely surprised me. The best way I can describe them is that they somehow feel soft and firm at the same time. The memory foam is very responsive and almost feels like slime or Play-Doh in the way you can squish and shape it, but it immediately returns back to its original form. They feel premium the moment you touch them.
I usually have a slightly hard time falling asleep and tend to toss around for a while before getting comfortable, but with this pillow I fell asleep incredibly fast. I’m not exaggerating when I say it took me less than two minutes the first night I used it. That alone impressed me.
The biggest difference for me has been shoulder and neck comfort. I have a weaker right shoulder, and sleeping on that side normally causes discomfort or makes me wake up in pain during the night. With this pillow, I was actually able to sleep on my right side comfortably and woke up without that usual soreness. I also noticed I slept through the night without waking up repeatedly to readjust, which is rare for me.
The contour shape definitely helps with alignment. The center cradles your head nicely while the raised edges support your neck well, especially for side sleeping. I can see why some people call these orthopedic pillows. The cooling pillow covers are also really nice. They feel smooth, breathable, and cool against the skin, which made the overall sleep experience feel more comfortable and “high-end.”
That said, these pillows are not for everyone. I can understand some of the other reviews mentioning that the shape can feel restrictive if you move around a lot during sleep, or if you prefer a flatter pillow. These are very specifically designed pillows, not the kind you casually fold and bunch up however you want.
My only major issue is the price. The pillows themselves are genuinely excellent, but I personally cannot justify spending around $330 for two pillows. I received them through the Amazon program, and while I really do love using them, if I were paying full price with my own money, I probably would not purchase them at that cost. If the price comes down significantly, though, I could absolutely see these being worth it for people dealing with neck or shoulder pain.
Overall, the comfort and support are fantastic, and they noticeably improved my sleep quality. My neck and shoulder feel much better in the mornings, which honestly matters more than fancy marketing words ever will. The pillows are great. The pricing department just seems to have taken a very confident nap.
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Reviewed in the United States on May 25, 2026