New Complete Pair GM GMC Chevrolet 6.6L OHV Duramax Diesel LMM Cylinder Heads 2006-2010

New Pair of GM Duramax 6.6L LMM Diesel Cylinder Heads

Fully Loaded OEM-Quality Replacement Heads

This is a brand-new pair of fully loaded cylinder heads for the GM Duramax 6.6L LMM diesel engine. Engineered for durability and performance, these heads come complete with valves, springs, and seals for a seamless, direct-fit installation. They are the ideal solution for restoring reliability to your Silverado or Sierra heavy-duty truck.

🛠️ In-House Machining Process

• Debris-Free Preparation: Every new casting is chemically cleaned and blown out to remove all residual machining oils, metal shavings, and manufacturing debris. This ensures your oiling system remains uncontaminated from the first start-up.

• In-House Precision Machining: Unlike “shelf-stock” heads, we perform all final machine work in-house. This includes final guide sizing and precision valve seat cutting to ensure perfect geometry and clearances before the head reaches the assembly bench.

• Pressure & Integrity Testing: To go beyond the factory standard, we pressure-test every head to 60 PSI. This verifies that the casting is free of porosity leaks or internal defects that could compromise the cooling or oiling systems.

• Dimensional Inspection: Our technicians perform a multi-point inspection of the gasket-sealing surface and bore alignment. This ensures the head is perfectly flat and meets tight OEM tolerances for a flawless fit.

• Professional Assembly & Setup: Valvetrain components are installed and verified in a clean-room environment. We check spring heights and seal seating to ensure the assembly is balanced and ready for high-performance use.

• Vacuum-Seal Verification: Every intake and exhaust port is Vacuum Tested. This guarantees a 100% airtight seal between the valves and seats, ensuring maximum compression and peak performance right out of the box.

📊 Technical Specifications

• Engine Size: 6.6L Turbo Diesel
• Engine Code: LMM (8th VIN Digit “6”)
• Material: Cast Aluminum
• Condition: Brand New
• Quantity: Pair (Left and Right Sides)
• Components Included: Fully loaded with valves, valve springs, and valve seals
• Fitment Type: Direct Replacement
• Core Return Required

🚛 Fitment Data

Common Applications:

• Chevrolet Express 2500: 2006–2010 Chevrolet Express 2500 (6.6L)
• Chevrolet Express 3500: 2006–2010 Chevrolet Express 3500 (6.6L)
• GMC Savana 2500: 2006–2010 GMC Savana 2500 (6.6L)
• GMC Savana 3500: 2006–2010 GMC Savana 3500 (6.6L)
• GMC Sierra 2500 Pickup: 2006 GMC Sierra 2500 Pickup (6.6L)
• GMC Sierra 2500 Pickup: 2007 GMC Sierra 2500 Pickup Classic Style Creased Door Skin VIN 6 Opt LMM (6.6L)
• GMC Sierra 2500 Pickup: 2007 GMC Sierra 2500 Pickup Classic Style Creased Door Skin VIN D Opt LBZ (6.6L)
• GMC Sierra 2500 Pickup: 2007 GMC Sierra 2500 Pickup New Style Smooth Door Skin (6.6L)
• GMC Sierra 2500 Pickup: 2008–2010 GMC Sierra 2500 Pickup (6.6L)
• GMC Sierra 3500 Pickup: 2006 GMC Sierra 3500 Pickup (6.6L)
• GMC Sierra 3500 Pickup: 2007 GMC Sierra 3500 Pickup Classic Style Creased Door Skin VIN 6 Opt LMM (6.6L)
• GMC Sierra 3500 Pickup: 2007 GMC Sierra 3500 Pickup Classic Style Creased Door Skin VIN D Opt LBZ (6.6L)
• GMC Sierra 3500 Pickup: 2007 GMC Sierra 3500 Pickup New Style Smooth Door Skin (6.6L)
• GMC Sierra 3500 Pickup: 2008–2010 GMC Sierra 3500 Pickup (6.6L)
• Chevrolet Silverado 2500 Pickup: 2006 Chevrolet Silverado 2500 Pickup (6.6L)
• Chevrolet Silverado 2500 Pickup: 2007 Chevrolet Silverado 2500 Pickup Classic Style Creased Door Skin VIN 6 Opt LMM (6.6L)
• Chevrolet Silverado 2500 Pickup: 2007 Chevrolet Silverado 2500 Pickup Classic Style Creased Door Skin VIN D Opt LBZ (6.6L)
• Chevrolet Silverado 2500 Pickup: 2007 Chevrolet Silverado 2500 Pickup New Style Smooth Door Skin (6.6L)
• Chevrolet Silverado 2500 Pickup: 2008–2010 Chevrolet Silverado 2500 Pickup (6.6L)
• Chevrolet Silverado 3500 Pickup: 2006 Chevrolet Silverado 3500 Pickup (6.6L)
• Chevrolet Silverado 3500 Pickup: 2007 Chevrolet Silverado 3500 Pickup Classic Style Creased Door Skin VIN 6 Opt LMM (6.6L)
• Chevrolet Silverado 3500 Pickup: 2007 Chevrolet Silverado 3500 Pickup Classic Style Creased Door Skin VIN D Opt LBZ (6.6L)
• Chevrolet Silverado 3500 Pickup: 2007 Chevrolet Silverado 3500 Pickup New Style Smooth Door Skin (6.6L)
• Chevrolet Silverado 3500 Pickup: 2008–2010 Chevrolet Silverado 3500 Pickup (6.6L)