Victor CNC DR-17 Cylinder Heads For Big-Block Chevys 120CC

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. Vehicle Specific

• Chevrolet:Big-Block Race

Attributes:

• Brand Name: Edelbrock
• GTIN: 00085347899197
• CNC Machined Combustion Chamber: Yes
• CNC Machined Exhaust Port: Yes
• CNC Machined Intake Port: Yes
• CNC Ported: Yes
• Combustion Chamber Volume: 120.0
• Cylinder Head Style: Bare
• Deck Height: 10.2
• Exhaust Port Location: Raised
• Exhaust Port Shape: Oval
• Exhaust Runner Volume: 90
• Exhaust Valve Job Diameter: 1.850"
• Grade Type: Performance
• Guide Plates Included: No
• Head Casting Number: 6143P
• Intake Port Location: Raised
• Intake Port Shape: Rectangle
• Intake Runner Volume: 425.0
• Intake Valve Job Diameter: 2.450"
• Material: Aluminum 356-T6
• RGL: WARNING: This product can expose you to Lead, which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.P65warnings.ca.gov.
• Retainer Lock Style: Not Included
• Spark Plug Style: Angle
• Special Notes: Features a 0.400 in. raised intake port.. Tall deck engines will require manifold spacers. Standard deck engine can use a Tall deck manifold.
• Steam Holes Drilled: Sold individually
• Valve Angle: 17
• Valve Cover Mounting Style: Perimeter bolt
• Valve Guide Material: Bronze
• Valve Guide Size O.D: 0.500"
• Valve Lock Style: Not Included
• Valve Spring Type: Not Included

Extended Information:

• Country of Origin: US
• Emissions : EPA Eligible

Packing Information:

• Quantity of Each: 1
• Package UOM: EA
• Dimension: 26 x 11 x 9.5 inches
• Weight: 43.4 POUNDS