{"product_id":"victor-cnc-dr-17-cylinder-heads-for-big-block-chevys-120cc","title":"Edelbrock 615467 - Victor CNC DR-17 Cylinder Heads for Big-Block Chevys, 120CC","description":"\u003cp\u003eThe 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.\u003c\/p\u003e\u003cp\u003eOffered \"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.\u003c\/p\u003e\u003cp\u003eEach 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.\u003c\/p\u003e\u003cp\u003eManufactured 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 durin g 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.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC Machined Combustion Chamber:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC Machined Exhaust Port:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC Machined Intake Port:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC Ported:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCombustion Chamber Volume:\u003c\/strong\u003e 120.0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder Head Style:\u003c\/strong\u003e Bare\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDeck Height:\u003c\/strong\u003e 10.2 in\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust Port Location:\u003c\/strong\u003e Raised\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust Port Shape:\u003c\/strong\u003e Oval\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust Runner Volume:\u003c\/strong\u003e 90\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust Valve Job Diameter:\u003c\/strong\u003e 1.850\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade Type:\u003c\/strong\u003e Performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuide Plates Included:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Casting Number:\u003c\/strong\u003e 6143P\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntake Port Location:\u003c\/strong\u003e Raised\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntake Port Shape:\u003c\/strong\u003e Rectangle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntake Runner Volume:\u003c\/strong\u003e 425.0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntake Valve Job Diameter:\u003c\/strong\u003e 2.450\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Aluminum 356-T6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRetainer Lock Style:\u003c\/strong\u003e Not Included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpark Plug Style:\u003c\/strong\u003e Angle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecial Notes:\u003c\/strong\u003e Features a 0.400 in. raised intake port.. Tall deck engines will require manifold spacers. Standard deck engine can use a Tall deck manifold.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteam Holes Drilled:\u003c\/strong\u003e Sold individually\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Angle:\u003c\/strong\u003e 17 deg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Cover Mounting Style:\u003c\/strong\u003e Perimeter bolt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Guide Material:\u003c\/strong\u003e Bronze\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Guide Size O.D:\u003c\/strong\u003e 0.500\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Lock Style:\u003c\/strong\u003e Not Included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Spring Type:\u003c\/strong\u003e Not Included\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Edelbrock","offers":[{"title":"Default Title","offer_id":44849331961991,"sku":"EDE615467","price":4714.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0744\/4008\/1543\/files\/267a5f63b5f5a.jpg?v=1788268839","url":"https:\/\/checkout.northernperformance.ca\/products\/victor-cnc-dr-17-cylinder-heads-for-big-block-chevys-120cc","provider":"Northern Performance","version":"1.0","type":"link"}