2001-2004 LB7 Duramax Premium Stock Plus New Cylinder Heads (RH & LH Set)

Restore factory performance and reliability to your 2001–2004 LB7 Duramax 6.6L with these brand-new Premium Stock Plus cylinder heads. Designed as a direct replacement for factory heads, these new castings eliminate the uncertainty associated with remanufactured cores while delivering the durability, airflow, and performance required for stock and mild performance applications.

Each cylinder head is precision machined and assembled using premium components to ensure proper sealing, valvetrain stability, and long service life. Featuring brand-new OE-style injector cups pre-installed from the factory, these heads arrive ready for installation and help eliminate the hassle of sourcing and installing injector cups separately. Whether you're replacing damaged cylinder heads or building a fresh engine, these Premium Stock Plus heads provide a dependable foundation for your Duramax.

Key Features

• Brand-new LB7 Duramax cylinder head castings
• Brand-new OE-style injector cups pre-installed
• Precision machined and assembled
• Diamond honed valve guides
• Unshrouded valves for improved airflow
• High-strength, heat-treated iron-based valve guides
• Premium nickel-based, non-magnetic valve seat inserts
• Multi-angle valve job
• New valve springs installed
• Assembled and ready for installation
• Direct replacement for factory cylinder heads
• Ideal for stock replacement or mild performance builds

Premium Stock Plus Construction

Built from all-new castings, these Premium Stock Plus cylinder heads are engineered to provide exceptional reliability and performance. Each head undergoes precision machining and assembly processes to ensure consistent quality, proper sealing, and optimal airflow.

New OE-style injector cups are installed during assembly, providing proper injector sealing and coolant isolation while maintaining factory fit and function. Combined with premium valvetrain components and precision machining, these heads are built to deliver years of dependable service.

By starting with brand-new castings, these heads eliminate concerns associated with used cores, cracks, repairs, or previous heat cycles, providing a fresh foundation for long-term engine durability.

What's Included

• Left and right new LB7 cylinder heads
• New OE-style injector cups installed
• Fully assembled and ready to install

Not Included

• Gaskets
• Head bolts
• Injectors
• Installation hardware

Vehicle Fitment

2001–2004 GM Duramax LB7 6.6L

• Chevrolet Silverado 2500HD
• Chevrolet Silverado 3500HD
• GMC Sierra 2500HD
• GMC Sierra 3500HD

Why Choose These New LB7 Cylinder Heads?

• Brand-new castings with no core history
• New OE-style injector cups already installed
• OE-style fit, function, and performance
• Premium valvetrain and machining upgrades
• Ideal for engine rebuilds and cylinder head replacement
• Built for long-term durability and dependable operation

Core Return Information

Sold as a matched left and right pair.

To receive full core credit, a good, reusable pair of LB7 cylinder heads must be returned. Cores must be free of cracks, excessive warping, or severe damage. Core returns are required within 90 days of purchase.