New Complete Pair GM GMC Chevrolet 6.6L OHV Duramax Diesel LML Cylinder Heads 2011-2016

Upgrade your Duramax engine with these brand new GM GMC 6.6 OHV LML cylinder heads, designed to fit 2011–2016 models. Built to meet or exceed OEM specifications, these fully loaded heads come ready for installation with valves, springs, and seals already assembled.

These cylinder heads are perfect for anyone looking to replace worn or damaged heads in their truck or commercial vehicle. The heads are pressure tested to ensure optimal performance and reliability, offering a seamless fit for your LML Duramax engine. Whether you’re upgrading for better performance or simply need a replacement, these loaded cylinder heads are engineered for durability and efficiency.

Features:

• Fits 2011–2016 GM GMC Duramax 6.6 OHV LML Diesel engines
• Comes fully assembled with valves, springs, and seals
• Precision-machined and pressure tested for performance and reliability
• Direct replacement with a perfect fit for easy installation
• Designed to meet or exceed OEM specifications
• Core Return Required

Applications:

• 2011–2016 GM and GMC trucks with Duramax 6.6 LML Diesel engines
• Compatible with various heavy-duty applications, including commercial trucks and pickups

Why Choose These Cylinder Heads? These loaded cylinder heads are perfect for those looking to restore or upgrade their 6.6 Duramax LML engine. With high-quality construction and a direct fit, they provide enhanced durability and performance for your truck or commercial vehicle. Whether you use your vehicle for towing, hauling, or daily driving, these cylinder heads are built to last.

Specifications:

• Engine: Duramax 6.6 OHV LML Diesel
• Year Range: 2011–2016
• Fully loaded: Includes valves, springs, and seals

Order Now for Fast Shipping! Get your truck back on the road with these brand new, fully loaded Duramax LML cylinder heads. We ship to the lower 48 states, ensuring you receive your parts quickly and hassle-free. Upgrade your engine today!

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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