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Vehicle Info NeededBig Victor Spread-Port CNC Aluminum Cylinder Head for Big Block Chevy
Ships on 09/22/2026
Lowest Price Guarantee- Big Block Chevy
- Intake Volume: (LH) 442cc (RH) 451cc
- Exhaust Volume: 189cc
- 92cc Combustion Chamber
- 14° Valve Angle
- Bare Head, Sold Individually
- Intended for high-output, large cubic inch big block Chevy race engines with 4.840" bore spacing
- A356 aluminum casting is HIP processed (Hot Isostatic Pressing) for superior strength, durability, and dimensional stability
- CNC-machined intake ports and raised exhaust runners provide better flow efficiency
- Extra deck material allows fine-tuning of the combustion chamber design as desired
- Recommended Intake Manifold: Edelbrock #28003 or #28005
- Required Valve Covers: #350-4259
Edelbrock and Pat Musi worked with Jesel to improve valvetrain geometry, delivering Pro Stock level technology on engines up to 10,000 RPM. Jesel's aluminum shaft-mounted system (KPS-387154) has a 1-pc stand that pairs the intake & exhaust stands for exceptional stability. The intake fulcrum is 1.82" long; available rocker ratios are 1.6:1 through 1.95:1. The exhaust fulcrum is 2" long; available rocker ratios are 1.6:1 through 2:1.
Combustion Chamber Volume: 92cc Intake Runner Volume: 442cc (L), 451cc (R) 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: --- Valve Pocket Diameter: 1.76" Valve Spring Maximum Lift: Springs not included Rockers: Use Jesel Shaft-Mount KPS-381754 Guideplate: n/a Pushrod Diameter: --- Exhaust Port Location: n/a Spark Plug Fitment: 14mm x 3/4' Reach,
Gasket SeatValve Lift Intake Exhaust .400' 288 226 .500' 353 254 .600' 415 277 .700' 468 302 .800' 496 324 .900' 491 328 18° (350-617569) Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench @ 28' H2O Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
Since founder Vic Edelbrock Sr. began building performance intake manifolds in 1938, Edelbrock has grown into one of the most trusted names in American high-performance parts, from carburetors and intake manifolds to cylinder heads, crate engines, and EFI systems. JEGS has spent decades supplying Edelbrock components to racers, engine builders, and street enthusiasts, backing this extensive lineup with in-house technical support, fast shipping, and a Price Match Guarantee so you can choose proven Edelbrock parts with confidence.
Cast Aluminum Cylinder Heads Developed for Competition
These lightweight cylinder heads for big block Chevy increase coolant heat dissipation and incorporate extra deck material to maximize gasket retention under high compression. They have specially-contoured combustion chambers, high-flow ports, and reinforced rocker stud bosses. Available bare or assembled, cylinder heads are sold individually.
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Victor Jr. 24° Cylinder Heads
Ideal for ultra-performance street machines and most racing, Victor Jr. 24° Heads have 300cc ports that produce impressive power on big blocks up to 510 cubic inches with 4.310" or larger bore. Their exhaust port exits are raised .534" to vastly improve exhaust flow. Maximum lift for hydraulic roller or flat tappet camshafts is .700"; maximum lift for mechanical roller camshafts is .880".
Victor 24° Cylinder Heads
To gain even more horsepower, the Victor 24° Series features partially CNC'd chambers, rolled-over deck, and altered valve locations that improve combustion efficiency. 340cc ports flow 390+ cfm on big blocks with 4.470" or larger bore for better flow velocity and throttle response. Like Jr. 24°, exhaust port exits are raised .534" and maximum lift is .700" (hydraulic) or .880" (mechanical).
Musi Victor 24º CNC-Ported Cylinder Heads
The only out-of-the-box head capable of 950+ HP from conventional big block port locations! Designed by 5-time Pro Street Champion Pat Musi, this version of the Victor 24° Cylinder Head has fully CNC'd chambers & ports. Exhaust port exits are raised .750" and maximum lift is .880" (mechanical).
Big Victor Spread-Port Cylinder Heads
Intended for big block Chevy race engines with 4.840" bore, these heads feature Edelbrock's Hot Isostatic Pressing (HIP) for superior strength and stability. Pat Musi and Jesel assisted with the design to improve valvetrain geometry, delivering Pro Stock level technology up to 10,000 RPM.
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