{"product_id":"edelbrock-chevy-bb-victor-cnc-dr-17-cylinder-heads-120cc","title":"Edelbrock Chevy BB Victor CNC DR-17 Cylinder Heads - 120cc","description":"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.","brand":"Edelbrock","offers":[{"title":"Default Title","offer_id":45052675850440,"sku":"EDE615467","price":3313.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0569\/0058\/3624\/files\/b9db8052c799e1909937c03adbec9f67L_88631d09-cc71-4b3f-9fec-d1c0e3b8c2df.jpg?v=1776990904","url":"https:\/\/coyotedirect.com\/products\/edelbrock-chevy-bb-victor-cnc-dr-17-cylinder-heads-120cc","provider":"Coyote Direct ","version":"1.0","type":"link"}