Edelbrock Chevy Big-Block Victor CNC DR-17 Oval-Port Cylinder Heads - Part 615467

The Victor CNC DR-17 Oval-Port Cylinder Heads for Big-Block Chevrolet engines (PN 615467) have a larger 120cc combustion chamber designed for large displacement, high-horsepower, naturally aspirated engines running on pump gas. This design allows for a true flat-top piston configuration, promoting greater efficiency and power output. Offered "bare," these heads feature a 425cc port volume, 2.450" intake valves, 1.850" exhaust valves, raised intake and exhaust ports, and a relocated spark plug position. The raised intake and exhaust ports are particularly beneficial in maximizing cylinder fill during the valve opening cycle, while the revised spark plug location ensures a more complete combustion. Combined with optimized valve placement, these improvements result in better airflow, more power, and higher overall engine efficiency. Each Victor CNC DR-17 cylinder head is cast at Edelbrock's state-of-the-art foundry using premium aluminum alloy and machined in the Edelbrock Race Center in Mooresville, North Carolina. This material undergoes hot isostatic pressing (H.I.P.) to ensure a more stable and dense grain structure, which increases durability and performance. The heads feature large CNC oval ports explicitly designed to maintain high airspeed, contributing to a high torque curve throughout the engine's operating range. Manufactured to the industry's tightest tolerances, these heads come fully CNC-machined, including their ports and combustion chambers. A 17° valve angle is incorporated to improve flow capability, while ductile-iron interlocking valve seats and premium manganese-bronze valve guides ensure long-lasting performance. The valve seat concentricity precision allows a perfect seal, eliminating leak-down and increasing cylinder pressure during operation. These heads are designed to be used with a shaft rocker system and can bolt directly onto standard deck blocks with a tall-deck manifold, but tall deck blocks require intake runner spacers. Victor CNC DR-17 Cylinder Heads for Oval-Port Big-Block Chevrolet engines have 120cc combustion chambers, allowing a true flat-top piston configuration for large displacement, high-horsepower, naturally aspirated pump-gas engines.

The Edelbrock Victor CNC DR-17 Oval-Port Cylinder Heads are engineered for high-performance big-block Chevrolet engines, offering a 120cc combustion chamber designed to support large displacement and high-horsepower naturally aspirated setups running on pump gas. These heads feature a true flat-top piston configuration, which enhances combustion efficiency and power output, making them suitable for serious street or race applications. Featuring a large 425cc port volume, 2.450-inch intake valves, and 1.850-inch exhaust valves, they maximize airflow and cylinder fill during the intake cycle. Raised intake and exhaust ports improve volumetric efficiency, while the relocated spark plug position ensures complete combustion for optimal engine performance. The combination of these features results in increased torque, horsepower, and overall engine efficiency.
Manufactured with precision at Edelbrock's state-of-the-art foundry, these heads are cast from premium aluminum alloy and undergo hot isostatic pressing (H.I.P.) to create a dense, stable grain structure that enhances durability and performance. Fully CNC-machined, including ports and combustion chambers, they are built to tight industry tolerances, ensuring consistent quality. The 17° valve angle improves airflow, and features like ductile-iron interlocking valve seats and manganese-bronze valve guides guarantee long-lasting performance and a perfect seal. These heads are designed for use with shaft rocker systems and can bolt directly onto standard or tall-deck blocks, with optional intake spacers for tall-deck applications. Ideal for high-horsepower applications, the Edelbrock Victor CNC DR-17 heads deliver improved airflow, combustion efficiency, and power, making them a top choice for performance enthusiasts seeking maximum engine output.
Note: These heads are not carburetor approved and require carb acknowledgment for installation.

Features:

• 120cc combustion chamber for large displacement engines

• True flat-top piston design for optimized combustion

• Large 425cc port volume for superior airflow

• Raised intake and exhaust ports enhance cylinder fill

• Relocated spark plug position for complete combustion

• Cast from premium aluminum alloy with H.I.P. treatment for durability

• Fully CNC-machined ports and chambers for precise airflow

• 17° valve angle improves flow capabilities

• Ductile-iron valve seats and manganese-bronze guides for longevity

• Compatible with standard and tall-deck engine blocks with optional spacers