New Pair Loaded Duramax 6.6L GM Chevrolet Silverado Sierra Cylinder Heads LLY W/ Head Gasket Set & Bolts, Water Pump & Timing Set

New Pair Loaded Duramax 6.6L GM Chevrolet Silverado Sierra Cylinder Heads LLY W/ Head Gasket Set & Bolts, Water Pump & Timing Set

Enhance the performance and reliability of your GM Duramax 6.6L engine with our brand-new loaded 6.6L Duramax LLY cylinder heads, head gasket set & bolts, timing kits, and water pump, designed for Silverado and Sierra models. Engineered for durability and peak performance, these heavy-duty aftermarket components ensure long-lasting efficiency under the most demanding conditions.

Key Features:

• Heavy-Duty Aftermarket Cylinder Heads: Built with a reinforced casting for superior strength and resistance to cracking, outperforming OEM durability. These heads are precision-engineered for high-pressure and high-temperature environments, making them ideal for heavy-duty applications.
• Pre-Assembled & Ready to Install: Each cylinder head comes fully loaded with high-quality valves, springs, and retainers, optimizing airflow and combustion for improved engine efficiency and power.
• Complete Solution: Includes fully assembled cylinder heads, head gasket set & bolts, timing kits, and a water pump for a seamless upgrade.
• Core Return Required

Benefits:

• Superior Performance: The thick casting and premium components improve engine performance by promoting better sealing, heat dissipation, and airflow. This results in increased power, fuel efficiency, and reduced emissions.
• Long-Lasting Durability: With reinforced casting and high-strength materials, these cylinder heads are built to last, reducing the need for frequent replacements and repairs.
• Ready for Installation: Our cylinder heads come loaded and assembled, making the installation process quick and efficient. Designed for an exact fit, no modifications are required, allowing you to get your vehicle back on the road with minimal downtime.

Why Choose Our Duramax 6.6L Cylinder Heads?

Choosing our heavy-duty aftermarket LLY cylinder heads means investing in quality, durability, and performance. Engineered to address common issues with factory heads, such as cracking under pressure, these heads are the perfect upgrade for your Silverado or Sierra. Backed by our commitment to providing premium products, these cylinder heads will keep your engine running smoothly for years to come.

Warranty Information

Our cylinder heads are backed by a two-year unlimited mileage parts warranty. The warranty covers parts only and does not include labor or incidental costs. To maintain warranty coverage, the heat tab must remain intact and unaltered.

Contact Us

For more information or assistance, visit our website and explore our extensive selection of high-quality cylinder heads and engine components at Heavy Duty Parts Company.

Heavy Duty Parts Company – Core Returns Policy

At Heavy Duty Parts Company, core returns are essential to our ability to provide high-quality, cost-effective cylinder heads to our customers. These returned cores supply essential components, such as keepers, springs, and retainers, which are critical to engine performance.

No Core Charge – Just Send It Back!

Unlike other companies, we do not charge a core fee upfront. Instead, we rely on our customers to return their used cores to keep our supply chain running smoothly.

Why Core Returns Matter

• Many small but essential parts from cores are reused to maintain OEM-quality cylinder heads.
• Returning cores keeps prices competitive by reducing the need for costly new components.
• It supports sustainability by minimizing waste and conserving resources.

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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Duramax 6.6L LLY