Product Description:
Upgrade your engine with Remanufactured GM LS3 Heads designed for maximum performance. These remanufactured GM LS3 heads are perfect for both 6.0L and 6.2L LS3 V8 engines, offering exceptional airflow, compression, and overall engine efficiency. Fully rebuilt to meet OEM specifications, these heads ensure that your engine performs like new, whether you’re restoring it or upgrading for more power.
Crafted from high-quality aluminum, these remanufactured GM LS3 heads are precision-machined for better airflow and enhanced performance. Whether you’re restoring your engine or working on a performance build, these heads offer the reliability and power you need.
Features:
- Casting #: 823 (ideal for GM 6.0L 6.2L LS3 engines)
- Material: High-quality aluminum construction for reduced weight and better cooling
- Compatibility: Designed for 6.0L and 6.2L LS3 V8 engines
- Rebuilt to OEM specifications: Precision-machined for improved airflow, power, and durability
- Sold in pairs: Includes both left and right cylinder heads for a complete engine overhaul
- Perfect for Performance Builds: Ideal for engine restorations and performance upgrades
- Core Return Required
These remanufactured GM LS3 heads deliver the same quality as factory-original parts, but at a more affordable price. Rebuild your engine with the confidence that these heads will ensure long-lasting, high-performance results.
Why Choose These Cylinder Heads:
- High-quality rebuilds that meet or exceed OEM specifications.
- Rebuilt by experts for excellent sealing, performance, and durability.
- Improved airflow for more power and better fuel efficiency.
- Fully compatible with GM 6.0L & 6.2L LS3 V8 engines.
- An excellent solution for engine restorations and performance enhancements.
Save time and money with these expertly remanufactured GM LS3 heads. Order your Remanufactured GM LS3 Heads today to ensure your engine runs at its best!
Heavy Duty Parts Company – Core Returns Policy
Effective December 17, 2025
At Heavy Duty Parts Company, core returns are essential to our ability to provide high-quality, cost-effective cylinder heads. Returned cores supply critical components—such as keepers, springs, and retainers—that are vital to proper engine performance and allow us to maintain OEM-level quality.
No Upfront Core Charge
Unlike many suppliers, we do not charge a core fee upfront. Instead, we rely on customers to return their used cores within the required timeframe.
Core Return Requirements
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Cores are due within 30 days of the purchase date
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If a core is not returned within 60 days, the product warranty is void
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Unreturned cores will be charged as follows:
Customers needing additional time may contact us to request an extension. Approved extensions will prevent core charges from being applied.
Core Return Process
Cylinder heads are shipped with prepaid core return labels included in packets attached to the outside of each box. If labels are missing, customers should contact us for replacements prior to returning the core.
Core Eligibility
Some cylinder heads do not require a core return. In certain cases, core requirements may be waived at our discretion.
Why Core Returns Matter
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Reused core components help maintain OEM-quality standards
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Core returns allow us to keep pricing competitive
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Recycling cores supports sustainability by reducing waste and conserving resources
This policy applies to all purchases made on or after December 17, 2025.
Send Back All Components
To ensure the quality and integrity of our remanufacturing process, we ask that you return all components that were originally included with your new cylinder head. This includes items such as:
- Rocker arms
- Camshafts (if applicable)
- Any other hardware that came with your purchase
Easy & Free Core Return Process
- Each purchase includes a prepaid core return label in a plastic sleeve on the box.
- Simply pack your core with all included components, attach the label, and drop it off with the carrier—no extra cost to you.
- Returned cores undergo inspection and recycling, ensuring maximum efficiency.
Customer Partnership & Sustainability
By returning your core and its components, you help maintain a reliable supply chain, ensuring we can continue offering top-quality products at the best prices. This process not only benefits your wallet but also contributes to a greener and more efficient automotive industry.
We appreciate your support in keeping our business and the industry running smoothly!
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