Big Victor Spread-Port CNC- 405cc Cylinder Heads For B/B Chevy

Big Victor CNC- 405cc Cylinder Heads For B/B Chevy by Edelbrock
  • Cylinder Head Specifications:
  • Combustion chamber volume: 92cc
  • Intake runner volume: 442 (lh) / 451 (rh)
  • Exhaust runner volume: 189cc
  • Intake valve diameter: 2.45" (Valves Not Included)
  • Exhaust valve diameter: 1.85" (Valves Not Included)
  • Valve stem diameter: N/A
  • Valve guides: Manganese bronze
  • Deck thickness: N/A
  • Valve spring diameter: Pocket diameter 1.76" (springs not included)
  • Valve spring maximum lift: N/A
  • Rocker stud: Use Jesel KPS-381754 shaft-mount
  • Guideplate: N/A
  • Pushrod diameter: N/A
  • Valve angle: 18° x 4.0° intake | 9° x 3.9° exhaust
  • Exhaust port location: N/A
  • Spark plug fitment: 14mm x 3/4 reach, gasket seat
Intended for high output, large cubic inch racing engines with 4.84" bore spacing, this head is an improvement over existing 18° designs, such as the Big Chief & Big Duke. The casting is made from A-356 aluminum and is Hot Isostatic Pressing processed (HIP) for superior strength, durability, dimensional stability and exceptional finish quality. These cylinder heads feature CNC ported intake ports and a raised exhaust runner design for improved flow efficiency. Chambers are fully CNC ported and extra material is included in the deck to allow fine tuning of the combustion chamber design, if desired. Edelbrock and Pat Musi worked with Jesel to improve the valvetrain geometry, delivering Pro-Stock level technology on engines up to 10,000 rpm. Jesel's shaft-mounted system, #KPS-387154, is made from lightweight 7000 series aluminum and features a one-piece stand design that pairs the intake and exhaust stands for improved valvetrain stability. The intake features a 1.820" long fulcrum and is available in 1.60:1 - 1.95:1 rocker ratios; the exhaust features a 2.000" long fulcrum and available in 1.60:1 - 2.00:1 rocker ratios. Requires Edelbrock valve covers #4259. Match with Edelbrock Victor CNC Series manifolds #28003 and #28005. Pro-Port version available for custom porting.
  Bare CNC Ported (Single)
Application Dyno Emissions Satin
Big Victor CNC 12° - 618268
Big Victor CNC 14° - 618368
Edelbrock Tech Note TECH NOTE: Please view Cylinder Head Flow Data and Valve Springs & Retainers for all Edelbrock Performance Aluminum Cylinder Heads.
The following guide is designed to help you determine which Edelbrock components are legal for use on your vehicle. Learn more about Edelbrock Product Emissions Guide.

    50-State Legal
    For Racing Use ONLY
    For Use on Pre-Pollution Controlled Vehicles (PPCV)
    Stock Replacement Part
    Engine Swaps