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Description
GM Chevrolet 6.0L LC8 Complete 821 LPG / CNG OEM Cylinder Head Set | 12640011Condition: NEW NEW TAKE OFF The GM 12600821 Cylinder Head is engineered for optimum performance in GM Gen III and IV engines with multiple sources highlighting its compatibility with 6. 2L engines. This genuine GM component is designed to enhance combustion efficiency and engine power making it a reliable choice for vehicles ranging from certain Cadillac models to Chevrolet and GMC applications. The GM 12640011 Cylinder Head is engineered for powerful
Condition: NEW / NEW TAKE OFFThe GM 12600821 Cylinder Head is engineered for optimum performance in GM Gen III and IV engines with multiple sources highlighting its compatibility with 6.2L engines. This genuine GM component is designed to enhance combustion efficiency and engine power making it a reliable choice for vehicles ranging from certain Cadillac models to Chevrolet and GMC applications.
The GM 12640011 Cylinder Head is engineered for powerful 6.0L LC8 engine applications delivering reliable performance for trucks vans and commercial vehicles. This OEM quality component meets GM standards for durability and efficiency across various platforms.
Hollander Number 306-00273
| Application | Year(s) | Engine / Fuel Type / Notes |
|---|---|---|
| EXPRESS 2500 VAN | 11-16 | 8-364 (6.0L) CNG (opt LC8) |
| EXPRESS 2500 VAN | 17-20 | 6.0L CNG (opt LC8) |
| EXPRESS 3500 VAN | 11-16 | 8-364 (6.0L) CNG (opt LC8) |
| EXPRESS 3500 VAN | 11-16 | 8-364 (6.0L) LPG (opt LC8) |
| EXPRESS 3500 VAN | 17-20 | 6.0L CNG (opt LC8) |
| EXPRESS 3500 VAN | 17-20 | 6.0L LPG (opt LC8) |
| SAVANA 2500 VAN | 11-16 | 8-364 (6.0L) CNG (opt LC8) |
| SAVANA 2500 VAN | 17-20 | 6.0L CNG (opt LC8) |
| SAVANA 3500 VAN | 11-16 | 8-364 (6.0L) CNG (opt LC8) |
| SAVANA 3500 VAN | 11-16 | 8-364 (6.0L) LPG (opt LC8) |
| SAVANA 3500 VAN | 17-18 | 6.0L LPG (opt LC8) |
| SAVANA 3500 VAN | 17-20 | 6.0L CNG (opt LC8) |
| SIERRA 2500 PICKUP | 13-19 | 6.0L CNG |
| SIERRA 3500 PICKUP | 15-19 | 6.0L CNG |
| SIERRA DENALI 2500 | 14-18 | 6.0L CNG |
| SIERRA DENALI 3500 | 15-18 | 6.0L CNG |
| SILVERADO 2500 PICKUP | 13-19 | 6.0L CNG |
| SILVERADO 3500 PICKUP | 15-19 | 6.0L CNG |
Part Number: 12640011
Manufacturer: GM
Weight: 60.0000 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
4.6 ★★★★★
Based on 23 reviews
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Product Reviews
★★★★★ 1
Horrible
Size: 5, Color: Sky Blue
Ordered this for my son’s graduation! They send an entirely different set! It wasn’t even a suit!! It was a shirt and pants which were dark as ever and not light blue! Please do not order this! Quality was cheap for the price as well!
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Reviewed in the United States on June 5, 2026
★★★★★ 4
Nice Suit - Light Gray Color OF Suit IS Not A Solid Light Gray, It Has Linear Designs
Size: 12, Color: Light Grey, Size: 12, Color: Light Grey
I had purchased this polyester and linen blend suit for my son, in size 12Y for him in the color light gray. The color of the suit depicted in the advertisement arrived to be a bit different upon arrival. It's not a solid color light gray, it actually has small black liner lines dispersed all over the suit. The coat features a single button in the center, and there are two side pockets fairly decent sized. Unfortunately right above the pockets are red colored lineal horizontal lines. I don't think those lines are part of the coat's design, there definitely is some printing malfunction. It is hard to see in the pictures advertised, you can see it in the pictures and video I have posted clearly.
The material of the suit is fairly acceptable, actually better than expected. The child can actually wear it multiple times for various occasions. The suit emits grace along with acceptable stitching in every apparel along with the bowtie. The suit did arrive in a slide bag all folded up, so there were a number of wrinkles especially on the coat, its as if it had lost its shape. I will definitely need to steam iron it before it will be worn.
Just like the coat has pockets the tailored pants also have two side pockets, and belt loops in case need of belt if the pants are loose.
I'm actually glad I had ordered two sizes up because compared to his current measurements the suit is big on, especially the pants waist and length. I had measured the suit myself and below are the measurements.
Pants Waist - 15.25 Inches
Pants Length - 35.75 Inches
Pant's Inseam 25 Inches
Coat's Length - 24.5 Inches
Coat's Shoulders - About 14.5 Inches
Coat's Sleeve Length - 22 Inches
Coat's Chest - 15.5 Inches
In addition to the suit, I also received a solid colored light gray, bowtie. The bowtie has an adjustable strap, so you can set the bowtie to your comfort in the collar. You can wear it along the suit or without it if needed to match with something and still manage to look a show topper!.
The coat has nice shoulder padding therefore it sits across the shoulders nicely having it hold its shape and style.
Overall it's not a bad purchase, suits like these always come in handy for a unexpected or expected events. I'm glad I had purchased this suit I'm sure it'll come to use one day.
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Reviewed in the United States on March 10, 2026
★★★★★ 5
Great Suit!
Size: 5, Color: Sky Blue
It fit well and looked very nice on my son
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Reviewed in the United States on April 17, 2026
★★★★★ 5
Adorable & Stylish Suit
Size: 4, Color: Light Grey
This suit is perfect for special occasions! The linen fabric is lightweight and breathable, great for warmer weather. The slim fit looks sharp, and the light grey color is classy. Comfortable for kids to wear and ideal for weddings or events!
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Reviewed in the United States on April 13, 2026
★★★★★ 5
GQ KIDS...For the love of being FLY!
Size: 8, Color: Sky Blue
I am highly suggesting this suit for purchase because the color alone is a standout and will have people asking where did you get the suit from? The length of the bowtie is adjustable, the color is bright and lively, the fabric is pure quality. You can run a hot iron over it or a steamer to get the fold lines out of it from how it was packaged, but it seems that even if you just hung it up in the bathroom while running a hot shower, the wrinkling would drop. I think the purchase price is good for all that you get which is a quality blazer, great slacks and a bowtie. It's a one stop shop for a graduation event, dinner, a formal party or even a photoshoot. My nephew wears a size 7 or 6-8, so I ordered a size 8 to be safe and it fits nicely.
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Reviewed in the United States on February 25, 2026