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Description
Set of 2 GM LS2 LS6 Gen III Gen IV Genuine OEM Cylinder Head 799 Assembly with Valves, Springs, and RockersCondition: USED REBUILDABLE CORE This Cylinder Head part number 12629058 is engineered for optimal engine performance in many V8 applications. Designed to enhance combustion cooling and overall power output it is widely used in vehicles such as light trucks and performance models. The part has demonstrated reliability in 5. 3L engines and its quality is supported by multiple technical sources and fitment records. Hollander Number 306 01749A
Condition: USED/REBUILDABLE COREThis Cylinder Head part number 12629058 is engineered for optimal engine performance in many V8 applications. Designed to enhance combustion cooling and overall power output it is widely used in vehicles such as light trucks and performance models. The part has demonstrated reliability in 5.3L engines and its quality is supported by multiple technical sources and fitment records. Hollander Number 306-01749A Application CAMARO 99-02 8-350 (5.7L) CORVETTE 99-00 CORVETTE 01-04 LS1 engine (VIN G 8th digit) FIREBIRD 99-02 5.7L GTO 04Hollander Number 306-01749B Application ALLURE 08-09 5.3L AVALANCHE 1500 07-10 5.3L AVALANCHE 1500 11-13 CANYON 09-12 5.3L COLORADO 09-12 5.3L CORVETTE 01-04 LS6 engine (VIN S 8th digit) CORVETTE 05 CORVETTE 06-07 6.0L CTS 04-05 5.7L (VIN S 8th digit 8-350) CTS 06-07 6.0L (VIN U 8th digit 8-364) ENVOY 05-09 5.3L (Denali) ENVOY XL 05-06 5.3L ENVOY XUV 05 5.3L ESCALADE 09-13 6.0L (Hybrid) EXPRESS 1500 VAN 08-14 8-323 (5.3L) EXPRESS 2500 VAN 08-12 8-323 (5.3L) EXPRESS 2500 VAN 08-16 8-292 (4.8L) EXPRESS 2500 VAN 17 4.8L EXPRESS 3500 VAN 08-16 8-292 (4.8L) EXPRESS 3500 VAN 17 4.8L GRAND PRIX 05-08 5.3L GTO 05-06 HUMMER H3 08-10 5.3L IMPALA 06-09 5.3L ISUZU ASCENDER 05-06 5.3L LACROSSE 08-09 5.3L MONTE CARLO 06-07 5.3L RAINIER 05-07 5.3L SAAB 9-7X 05-09 8 cylinder SAVANA 1500 VAN 08-14 8-323 (5.3L) SAVANA 2500 VAN 08-12 8-323 (5.3L) SAVANA 2500 VAN 08-16 8-292 (4.8L) SAVANA 2500 VAN 17 4.8L SAVANA 3500 VAN 08-16 8-292 (4.8L) SAVANA 3500 VAN 17 4.8L SIERRA 1500 PICKUP 05-06 5.3L VIN B (8th digit opt L33) SIERRA 1500 PICKUP 07 classic style (creased door skin) 5.3L VIN B (8th digit opt L33) SIERRA 1500 PICKUP 07 style (smooth door skin) 4.8L SIERRA 1500 PICKUP 07 style (smooth door skin) 5.3L SIERRA 1500 PICKUP 08-10 5.3L SIERRA 1500 PICKUP 08-13 4.8L SIERRA 1500 PICKUP 09 6.0L whybrid option (opt HP2) SIERRA 1500 PICKUP 10-13 6.0L SIERRA 1500 PICKUP 11-13 5.3L gasoline SILVERADO 1500 PICKUP 05-06 5.3L VIN B (8th digit opt L33) SILVERADO 1500 PICKUP 07 classic style (creased door skin) 5.3L VIN B (8th digit opt L33) SILVERADO 1500 PICKUP 07 style (smooth door skin) 4.8L SILVERADO 1500 PICKUP 07 style (smooth door skin) 5.3L SILVERADO 1500 PICKUP 08-10 5.3L SILVERADO 1500 PICKUP 08-13 4.8L SILVERADO 1500 PICKUP 09 6.0L whybrid option (opt HP2) SILVERADO 1500 PICKUP 10-13 6.0L SILVERADO 1500 PICKUP 11-13 5.3L gasoline SSR 05-06 SUBURBAN 1500 07-09 8-323 (5.3L) SUBURBAN 1500 10-14 (5.3L) TAHOE 07 TAHOE 08-09 4.8L TAHOE 08-09 5.3L TAHOE 08-09 6.0L TAHOE 10-14 TRAILBLAZER 06-08 5.3L TRAILBLAZER 06-09 6.0L TRAILBLAZER EXT 05-06 5.3L YUKON 07-09 4.8L YUKON 07-14 5.3L YUKON 08-13 6.0L YUKON XL 1500 07-14 5.3L
Part Number: 12629058
Manufacturer: GM
Weight: 54.0000 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
4.1 ★★★★★
Based on 1549 reviews
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Product Reviews
★★★★★ 5
Exactly what they say it is.
Size: 72"W x 72"L (Pack of 1), Color: 1b. Clear-heavy
Appears to work exactly as advertised, and quality is very satisfactory, which is always a pleasant surprise on Amazon. Magnets are strong enough, plastic feels pliable and durable. Don't forget the rings aren't included.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 20, 2026
★★★★★ 5
Perfect Weight
Size: 72"W x 72"L (Pack of 1), Color: 1a. Clear
Is a perfect liner. It’s not super thick or heavy. Easy to hang.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026
★★★★★ 4
Too lightweight and flimsy, but it does the job
Size: 72"W x 72"L (Pack of 1), Color: 1a. Clear
This shower liner works as expected, but it is a bit lightweight, and will drift around in the shower.
I will look at getting a more heavy duty one in the future. This one has the 3 magnets, and that isn't enough.
I would recommend getting one with double the magnets and a thicker plastic. I went cheap and regret it slightly, but at least these things are made to be disposable.
Other than that, the durability seems good, and it looks and feels like you would expect, but as stated, the plastic is flimsy and flutters around. Seems fairly mold resistant vs other liners I've used from the store (like cheaper Walmart ones etc).
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 8, 2026
★★★★★ 5
The ultimate water bottle
Color: Iced Breeze, Size: 24 Ounces
I can’t believe I’m so excited about a water bottle. The design is amazing - I love that there’s no straw poking up but there’s still a straw sip function. I like that the carrying hook doubles as a lid locking mechanism. This bottle feels very sturdy but it’s sleek and easy to grab - I have small hands and it isn’t a problem for me to drink from with one hand. It’s also really nice that this bottle fits in standard couple holders both at the gym in the machines and in my car. The color selection is so fun and I am pleased that my bottle looks exactly as pictured. My water has stayed cold and my ice cubes frozen for over 12 hours now. Cannot recommend enough!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
★★★★★ 5
Keeps drinks cold all day
Color: Very, Very Dark, Size: 24 Ounces
We got this Owala bottle for our son to use as his everyday school water bottle, and it has been excellent. The 24oz size holds plenty of water for the school day without being overly bulky or heavy to carry around.
The insulation works extremely well. Drinks stay cold all day long, even when the bottle sits in a backpack for hours. That’s probably the feature we’ve been most impressed with so far. It’s also been great for car trips since it keeps water cold for extended periods without needing constant refills.
The design is really well thought out too. The built-in straw makes it easy to drink from quickly during class or while traveling, and the lid feels secure and leak-resistant when closed. It also has a clean, modern look that feels a little more premium than many standard water bottles.
Build quality feels solid overall, and it seems designed to hold up well to everyday use from school, sports, and travel.
Overall, this has been a fantastic everyday water bottle and definitely lives up to the hype. Keeps drinks cold, holds a good amount of water, and works equally well for school or road trips.
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Reviewed in the United States on May 28, 2026
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