Chevy Big Block Aluminum Cylinder Head

Build your Big Block Chevy engine with a bare aluminum cylinder head engineered for maximum airflow and custom performance assembly. Featuring large 345cc intake runners, 124cc heart-shaped combustion chambers, rectangle intake ports, and raised rectangular exhaust ports, this cylinder head is designed for serious street performance, drag racing, marine, and high-horsepower Big Block Chevy applications.

The large runner design helps support the airflow requirements of larger displacement engines, making this casting an excellent choice for 454, 496 stroker, and other performance-oriented Big Block Chevy combinations. The heart-shaped combustion chamber design promotes efficient combustion while supporting improved throttle response, torque production, and horsepower potential.

Unlike assembled cylinder heads, this bare casting allows engine builders to select valve sizes, springs, retainers, and valvetrain components that match their specific camshaft profile, RPM range, and performance goals. This flexibility makes it ideal for custom engine builds, machine shop assembly, and specialized performance applications.

Constructed from lightweight aluminum, this cylinder head helps reduce weight while dissipating heat more efficiently than traditional cast iron heads. Whether you're building a street machine, drag car, marine engine, or custom high-performance Big Block Chevy combination, this bare cylinder head provides the airflow foundation needed for serious power production.

 

Cylinder Head Technology
Designed with 345cc intake runners, 124cc heart-shaped combustion chambers, rectangle intake ports, and raised rectangular exhaust ports, this aluminum cylinder head is engineered to support the airflow demands of larger displacement Big Block Chevy engines. The bare casting configuration allows builders to customize the valvetrain and cylinder head assembly to match specific engine requirements.

Performance Benefits
The large runner and port design help maximize airflow and cylinder filling, supporting stronger torque production and increased horsepower potential. Aluminum construction helps reduce weight and dissipate heat more efficiently than traditional cast iron cylinder heads, making this casting well suited for high-performance street, racing, and marine applications.

COMPATIBLE WITH
CHEVROLET BIG BLOCK V8
• 6.5L / 396 in³
• 6.6L / 402 in³
• 7.0L / 427 in³
• 7.4L / 454 in³
• 8.1L / 496 in³ stroker combinations (application-specific verification required)

COMMON VEHICLE APPLICATIONS
Chevrolet Chevelle
Chevrolet Camaro
Chevrolet Nova
Chevrolet El Camino
Chevrolet Impala
Chevrolet C10
Chevrolet C/K Series Trucks

NOTES
• Fits Big Block Chevy Mark IV engine platforms
• Bare cylinder head casting requires final assembly
• Rectangle intake port design
• Raised rectangular exhaust ports
• Verify all valvetrain components before assembly
• Not compatible with Small Block Chevy, LS, or LT engines
• Cylinder head sold individually (purchase quantity of 2 required for complete engine).

SPECIFICATIONS
Assembled: No
Combustion Chamber Style: Heart
Combustion Chamber Volume: 124cc
Cylinder Head Finish: Natural
Cylinder Head Material: Aluminum
Exhaust Port Location: Raised
Exhaust Port Shape: Rectangular
Intake Port Location: Standard
Intake Port Shape: Rectangular
Intake Runner: 345cc
Quantity: Sold Individually
Valve Guide Material: Bronze