Brand New Pair 6.5 OHV GM Diesel Aftermarket Cylinder Heads (60° Angle)

Brand New Pair 6.5 OHV GM Diesel Aftermarket Cylinder Heads (60° Angle)

Enhance your GM, Chevy, or Hummer with our brand-new 6.5L OHV diesel aftermarket cylinder heads, featuring the specific 60° intake bolt angle for turbo applications.

This is a pair of brand-new aftermarket cylinder heads for the GM 6.5L diesel engine. These heads come fully assembled with valves and springs, engineered specifically to withstand the high pressures and temperatures of diesel operation while ensuring a perfect fit and extended engine life.

🛠️ In-House Machining Process

• Debris-Free Preparation: Every new casting is chemically cleaned and blown out to remove all residual machining oils and manufacturing debris. This ensures your diesel engine’s 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 system.
• 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 heavy-duty turbo diesel 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

• Condition: Brand New Aftermarket Casting
• Quantity: Pair (2 Cylinder Heads)
• Engine Compatibility: GM 6.5L OHV Diesel
• Intake Bolt Angle: 60° (Specifically for Turbo Van and Hummer applications)
• Material: Premium-grade alloy for high-pressure diesel environments
• Assembly Status: Fully Loaded (Includes Valves and Springs)
• Performance: Improved power, smoother operation, and better fuel efficiency

🚘 Fitment Applications

Compatible with the following Turbocharged applications:

• G-Series Vans (Turbo): GMC and Chevrolet
• Hummer H1 (Turbo): AM General
• Note: For non-turbo trucks or vans requiring the 90° angle, please see our other listing.