New GMC Chevrolet Truck 454 7.4L Cylinder Head – Cast Iron 1996-2000 # 279

New GMC Chevrolet 454 7.4L Cast Iron Cylinder Head (Casting #279) 1996–2000

Premium OEM-Quality Replacement for Heavy-Duty Performance

This brand-new cast iron cylinder head is a professional-grade replacement for 1996–2000 GMC and Chevrolet trucks equipped with the 454 7.4L engine. Featuring the heavy-duty #279 casting, this unit is engineered to meet or exceed OEM specifications for long-term durability in demanding towing and hauling applications. Each head comes fully preloaded with valves and springs, providing a direct-fit solution designed to restore consistent big-block performance and compression.

🛠️ 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: 7.4L / 454
• Casting Number: 279
• Material: Premium-Grade Cast Iron
• Condition: Brand New
• Years: 1996–2000
• Core Return Required
• Each Cylinder Head Includes: Valves and Springs Installed

🚛 Fitment Data

Common Applications:

• Chevrolet 2500 Pickup: 1996–2000 Chevrolet 2500 Pickup (7.4L V8)
• Chevrolet 30 Van: 1996 Chevrolet 30 Van (7.4L V8)
• Chevrolet 3500 Pickup: 1996–2000 Chevrolet 3500 Pickup (7.4L V8)
• Chevrolet Express 3500 Van: 1996–2000 Chevrolet Express 3500 Van (7.4L V8)
• GMC 2500 Pickup: 1996–2000 GMC 2500 Pickup (7.4L V8)
• GMC 3500 Pickup: 1996–2000 GMC 3500 Pickup (7.4L V8)
• GMC 3500 Van: 1996 GMC 3500 Van (7.4L V8)
• GMC Savana 3500 Van: 1996–2000 GMC Savana 3500 Van (7.4L V8)
• Chevrolet Suburban 2500: 1996–1999 Chevrolet Suburban 2500 (7.4L V8)

• 📦 Core Return & Warranty

  Core Process: No upfront core fee. Receive your new heads and compare them to your originals before installation. Once complete, use the pre-paid return label included in your shipment. Cores must be returned within 30 days. Click here for Core Policy.

  Warranty: Includes a 2-Year Unlimited Mileage Warranty. Click here for Warranty details.