New Loaded Duramax 6.6L GM Silverado Sierra Cylinder Head LLY

Enhance the performance and reliability of your GM Duramax 6.6L engine with our brand-new loaded 6.6 Duramax LLY cylinder heads, designed specifically for the Silverado and Sierra models. These heavy-duty aftermarket cylinder heads are engineered to meet or exceed OEM specifications, ensuring superior durability and performance, even under the most demanding conditions. Loaded with valves, springs, and retainers, these cylinder heads are ready for seamless installation and built to deliver long-lasting reliability.

Key Features:

• Durable Aftermarket Casting: Our LLY cylinder heads are manufactured with a robust aftermarket casting, providing greater strength and resistance to cracking compared to the factory heads. The thicker casting design is built to withstand high pressure and temperatures, making it ideal for heavy-duty use.
• Loaded with High-Quality Components: These cylinder heads come fully assembled with high-performance valves, springs, and retainers. This setup optimizes airflow and combustion, enhancing overall engine efficiency and power output.
• Precision Engineering: Designed to meet exact specifications, our LLY cylinder heads ensure a perfect fit and reliable performance in GM Duramax 6.6L engines. The precision-machined valve seats and guides offer enhanced durability and optimal sealing, preventing leaks and extending the lifespan of your engine components.
• Application Fit: Specifically designed for GM Silverado and Sierra trucks with the 6.6L Duramax LLY engine, providing a perfect fit and easy installation.

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.

Shipping Information

We ship exclusively to the lower 48 states. Insurance, packaging, and handling are included in the shipping cost to ensure safe and secure delivery.

Warranty Information

Our cylinder heads are backed by a 1-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.

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Duramax 6.6 LLY