Brand New Pair 6.5L OHV GM Diesel Aftermarket Cylinder Heads (#567 Casting, 90° Intake Bolt Angle)

Professional-Grade Aftermarket Replacement Cylinder Heads

Fully Assembled & Ready to Bolt On. This is a complete pair of brand new aftermarket heavy-duty cylinder heads for GM, Chevrolet, GMC, and Hummer 6.5L OHV diesel engines. Featuring the #567 casting and a 90° intake bolt angle, these cylinder heads are engineered to restore optimal compression and long-term durability.

🛠️ 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 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.
• 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. 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. Each head comes fully assembled with valves and springs, ready for a direct bolt-on installation.
• 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 right out of the box.

📊 Technical Specifications

• Engine Type: GM 6.5L OHV Diesel
• Casting Number: #567
• Intake Angle: 90 Degrees
• Condition: Brand New Aftermarket
• Configuration: Pair (Left and Right)
• Core Return Required

🚘 Fitment Data

Common Applications:

• Chevy/GMC 2500 & 3500 Pickup: 1992–2002 (6.5L Diesel)
• Chevy/GMC 1500 Pickup: 1994–1998 (6.5L Diesel)
• Chevy Suburban / Tahoe / Yukon: 1994–1999 (6.5L Diesel)
• G/K/C Series Trucks & Vans: Various (6.5L Diesel)