Chevy Big Block Hydraulic Roller Assembled Aluminum Cylinder Head
Chevy Big Block Hydraulic Roller Assembled Aluminum Cylinder Head
SKU: SKU: JM4221
Low stock
Product Details
Features
- 345cc intake runners support high-horsepower BBC builds
- Hydraulic roller springs support modern cam profiles
- 124cc chambers suit large displacement combinations
- Assembled aluminum construction simplifies installation
Description
Upgrade your Big Block Chevy engine with a fully assembled aluminum cylinder head engineered for high-performance hydraulic roller camshaft combinations. Featuring large 345cc intake runners, 124cc heart-shaped combustion chambers, and rectangle intake ports, these cylinder heads are designed to support the airflow demands of serious 454, 496, and 540 cubic inch Big Block Chevy builds.
The high-flow port design helps improve cylinder filling and combustion efficiency, supporting stronger torque production, improved throttle response, and increased horsepower potential throughout the RPM range. The large 345cc intake runners make these cylinder heads an excellent choice for larger displacement street performance, drag racing, marine, and street/strip applications where maximum airflow is critical.
Constructed from lightweight aluminum, these cylinder heads help reduce weight while dissipating heat more efficiently than traditional cast iron heads. Bronze valve guides, steel valve seats, stainless steel valves, and hydraulic roller valve springs provide the durability required for demanding performance applications.
Delivered fully assembled with valves and valve springs installed, these Big Block Chevy cylinder heads provide a solid foundation for performance engine builds requiring increased airflow, modern hydraulic roller compatibility, and proven aluminum cylinder head performance.
Whether you're upgrading a 454 street machine, building a 496 stroker, or assembling a high-output 540 Big Block Chevy combination, these assembled aluminum cylinder heads deliver the airflow capacity and durability serious BBC enthusiasts demand.
Cylinder Head Technology
Designed with large 345cc intake runners, 124cc heart-shaped combustion chambers, and rectangle intake ports, these assembled aluminum cylinder heads are engineered to maximize airflow in high-performance Big Block Chevy applications. Stainless steel valves, bronze valve guides, steel valve seats, and hydraulic roller valve springs provide durability for demanding street and racing environments.
Performance Benefits
The large runner and rectangle port design help support increased airflow and improved cylinder filling, making these cylinder heads well suited for larger displacement Big Block Chevy combinations. Aluminum construction helps reduce weight and dissipate heat more efficiently, supporting improved throttle response, stronger torque production, and greater horsepower potential.
Specs
| Assembled | Yes |
| CNC Ported | No |
| Combustion Chamber Style | Heart |
| Combustion Chamber Volume | 124 cc |
| Deck Height | Standard |
| Deck Thickness | Standard |
| Exhaust Crossover | No |
| Exhaust Port Height | 1.700 in. |
| Exhaust Port Location | Standard |
| Exhaust Port Shape | Square |
| Exhaust Port Width | 1.500 in. |
| Exhaust Valve Material | Stainless Steel |
| Finish | Natural |
| Grade Type | Performance |
| Intake Port Height | 2.300 in. |
| Intake Port Location | Standard |
| Intake Port Shape | Rectangle |
| Intake Port Width | 1.400 in. |
| Intake Runner Volume | 345 cc |
| Intake Valve Material | Stainless Steel |
| Material | Aluminum |
| Quantity | Sold Individually |
| Valve Guide Material | Bronze |
| Valve Seat Material | Steel |
| Valve Springs Included | Yes |
| Valves Included | Yes |
Engine Fitment
COMPATIBLE WITH
CHEVROLET BIG BLOCK V8 ENGINES
• 6.5L / 396 in³
• 6.6L / 402 in³
• 7.0L / 427 in³
• 7.4L / 454 in³
• 8.1L / 496 in³ Stroker Applications*
* Application-specific verification required.
COMMON VEHICLE APPLICATIONS
• Chevrolet Chevelle
• Chevrolet El Camino
• Chevrolet Camaro
• Chevrolet Monte Carlo
• Chevrolet Nova (BBC Swap Applications)
• Chevrolet Corvette (Big Block Equipped)
• Chevrolet C10 / C/K Series Trucks
• Chevrolet Impala
• Chevrolet Caprice
NOTES
• Compatible with Chevrolet Big Block Mark IV, Gen V, and Gen VI engine platforms.
• Rectangle-port cylinder head design.
• Designed for hydraulic roller camshaft applications.
• Intake Port Volume: 345cc.
• Combustion Chamber Volume: 124cc.
• Compatible with rectangle-port intake manifolds only.
• Verify pushrod length, rocker arm geometry, valve spring requirements, and piston-to-valve clearance before installation.
• Compatible intake manifolds must use a rectangle-port configuration.
Cylinder head sold individually (purchase quantity of 2 required for complete engine).
Q&A
Emissions Notice
This product is legal for off road use and non pollution controlled vehicles (1965 & older); however, it has not been tested or approved by the California Air Resources Board (CARB) for highway vehicles in the state of California. By purchasing this product, buyer agrees it will not be used on pollution controlled vehicles in California, or in a state with similar emissions regulations.
Chevy Big Block Hydraulic Roller Assembled Aluminum Cylinder Head
Upgrade your Big Block Chevy engine with a fully assembled aluminum cylinder head engineered for high-performance hydraulic roller camshaft combinations. Featuring large 345cc intake runners, 124cc heart-shaped combustion chambers, and rectangle intake ports, these cylinder heads are designed to support the airflow demands of serious 454, 496, and 540 cubic inch Big Block Chevy builds.
The high-flow port design helps improve cylinder filling and combustion efficiency, supporting stronger torque production, improved throttle response, and increased horsepower potential throughout the RPM range. The large 345cc intake runners make these cylinder heads an excellent choice for larger displacement street performance, drag racing, marine, and street/strip applications where maximum airflow is critical.
Constructed from lightweight aluminum, these cylinder heads help reduce weight while dissipating heat more efficiently than traditional cast iron heads. Bronze valve guides, steel valve seats, stainless steel valves, and hydraulic roller valve springs provide the durability required for demanding performance applications.
Delivered fully assembled with valves and valve springs installed, these Big Block Chevy cylinder heads provide a solid foundation for performance engine builds requiring increased airflow, modern hydraulic roller compatibility, and proven aluminum cylinder head performance.
Whether you're upgrading a 454 street machine, building a 496 stroker, or assembling a high-output 540 Big Block Chevy combination, these assembled aluminum cylinder heads deliver the airflow capacity and durability serious BBC enthusiasts demand.
Cylinder Head Technology
Designed with large 345cc intake runners, 124cc heart-shaped combustion chambers, and rectangle intake ports, these assembled aluminum cylinder heads are engineered to maximize airflow in high-performance Big Block Chevy applications. Stainless steel valves, bronze valve guides, steel valve seats, and hydraulic roller valve springs provide durability for demanding street and racing environments.
Performance Benefits
The large runner and rectangle port design help support increased airflow and improved cylinder filling, making these cylinder heads well suited for larger displacement Big Block Chevy combinations. Aluminum construction helps reduce weight and dissipate heat more efficiently, supporting improved throttle response, stronger torque production, and greater horsepower potential.
COMPATIBLE WITH
CHEVROLET BIG BLOCK V8 ENGINES
• 6.5L / 396 in³
• 6.6L / 402 in³
• 7.0L / 427 in³
• 7.4L / 454 in³
• 8.1L / 496 in³ Stroker Applications*
* Application-specific verification required.
COMMON VEHICLE APPLICATIONS
• Chevrolet Chevelle
• Chevrolet El Camino
• Chevrolet Camaro
• Chevrolet Monte Carlo
• Chevrolet Nova (BBC Swap Applications)
• Chevrolet Corvette (Big Block Equipped)
• Chevrolet C10 / C/K Series Trucks
• Chevrolet Impala
• Chevrolet Caprice
NOTES
• Compatible with Chevrolet Big Block Mark IV, Gen V, and Gen VI engine platforms.
• Rectangle-port cylinder head design.
• Designed for hydraulic roller camshaft applications.
• Intake Port Volume: 345cc.
• Combustion Chamber Volume: 124cc.
• Compatible with rectangle-port intake manifolds only.
• Verify pushrod length, rocker arm geometry, valve spring requirements, and piston-to-valve clearance before installation.
• Compatible intake manifolds must use a rectangle-port configuration.
Cylinder head sold individually (purchase quantity of 2 required for complete engine).
SPECIFICATIONS
Assembled: Yes
CNC Ported: No
Combustion Chamber Style: Heart
Combustion Chamber Volume: 124 cc
Deck Height: Standard
Deck Thickness: Standard
Exhaust Crossover: No
Exhaust Port Height: 1.700 in.
Exhaust Port Location: Standard
Exhaust Port Shape: Square
Exhaust Port Width: 1.500 in.
Exhaust Valve Material: Stainless Steel
Finish: Natural
Grade Type: Performance
Intake Port Height: 2.300 in.
Intake Port Location: Standard
Intake Port Shape: Rectangle
Intake Port Width: 1.400 in.
Intake Runner Volume: 345 cc
Intake Valve Material: Stainless Steel
Material: Aluminum
Quantity: Sold Individually
Valve Guide Material: Bronze
Valve Seat Material: Steel
Valve Springs Included: Yes
Valves Included: Yes
