Chevy LS3 Aluminum Cylinder Head
Chevy LS3 Aluminum Cylinder Head
SKU: SKU: JM4600
In stock
Product Details
Features
- Fits GM LS Gen III/IV applications; verify cathedral or rectangular port compatibility before ordering
- 260cc intake runners, 68.4cc chambers for improved airflow and power potential
- Bare aluminum casting allows custom valve train selection for your camshaft and power goals
- Lightweight aluminum construction improves heat dissipation versus factory iron castings
Description
Upgrade your GM LS with bare aluminum cylinder heads engineered to improve airflow, combustion efficiency, and horsepower potential. Featuring 260cc intake runners, 68.4cc combustion chambers, these heads are built for street, strip, and performance engine builds that need better breathing than stock castings.
Improved Airflow & Power Potential
Optimized runner and chamber design helps move more air through the engine, improving throttle response, torque, and top-end horsepower potential across the RPM range.
Bare Head Build Flexibility
Bare cylinder head configuration gives builders the flexibility to select valves, springs, retainers, and hardware matched to the exact camshaft, RPM range, and power goal.
Aluminum Construction
Lightweight aluminum construction reduces weight compared to factory iron heads while improving heat dissipation for more consistent performance under demanding conditions.
Built for Street & Performance Builds
Ideal for performance rebuilds, restorations, and upgraded engine combinations. Always verify piston-to-valve clearance, camshaft compatibility, intake manifold fit, and header clearance before final installation.
Specs
| Assembled | No |
| Combustion Chamber Style | Heart |
| Combustion Chamber Volume | 68.4cc |
| Cylinder Head Finish | Natural |
| Cylinder Head Material | Aluminum |
| Exhaust Port Location | Standard |
| Exhaust Port Shape | D-port |
| Intake Port Location | Standard |
| Intake Port Shape | Cathedral |
| Intake Runner | 260cc |
| Quantity | Sold Individually |
| Valve Guide Material | Bronze |
Engine Fitment
COMPATIBLE WITH
GM LS SERIES V8 ENGINES - RECTANGULAR PORT
• 6.0L / 364 in³ (L76, L77, L98)
• 6.2L / 376 in³ (LS3, L92, L99, L9H)
• 7.0L / 427 in³ (LS7 requires application-specific verification)
COMMON VEHICLE APPLICATIONS
Chevrolet Corvette (LS3 equipped)
Chevrolet Camaro (LS3 / L99 equipped)
Chevrolet SS / Pontiac G8 (LS3 / L76 equipped)
Cadillac CTS-V applications using compatible LS architecture
GM trucks and swaps using rectangular-port LS cylinder heads
NOTES
Designed for rectangular-port LS intake manifold applications.
Verify intake manifold, rocker arm, valve cover, head gasket bore, and head bolt/stud compatibility before installation.
Cylinder head sold individually (purchase quantity of 2 required for complete engine).
Not compatible with cathedral-port LS intake manifolds, Gen V LT direct-injection engines, Gen I SBC, or Big Block Chevy engines.
Q&A
What engines are these cylinder heads compatible with?
These cylinder heads are designed for COMPATIBLE WITH, CHEVROLET SMALL BLOCK V8 GEN. III/IV (LS BASED).
Are these heads assembled or bare?
These cylinder heads are sold bare (not assembled). Please refer to the product details for full specifications and included components.
What is the combustion chamber size?
These cylinder heads feature a combustion chamber volume of 68.4cc, which can affect compression ratio and overall engine performance.
What material are these cylinder heads made from?
They are made from aluminum, which helps reduce weight and improve heat dissipation.
Will these cylinder heads improve engine performance?
Yes, performance cylinder heads are designed to improve airflow, which can increase horsepower, torque, and overall engine efficiency.
Are these a good upgrade over stock cylinder heads?
Yes, these cylinder heads are a strong upgrade for improving airflow and overall engine performance compared to factory heads.
Do these heads require additional components for installation?
Depending on your setup, additional components such as gaskets, pushrods, valve train components, or tuning may be required.
Are these suitable for street or race applications?
These cylinder heads can be used for street performance and performance builds depending on the overall engine combination.
Emissions Notice
This Top Street Performance (TSP) product is designed for racing and off-road competition use only. It is not legal for use on public roads or emissions-controlled vehicles and does not comply with federal, state, or local emissions regulations. The buyer assumes all responsibility for legal use and installation.
What is a Emissions-Controlled Vehicle?
"An emissions-controlled vehicle is any vehicle equipped with a factory-installed emissions control system designed to reduce air pollution. These systems include catalytic converters, oxygen sensors, EGR (Exhaust Gas Recirculation) valves, and diesel particulate filters (DPF). Most vehicles manufactured after 1975 are considered emissions-controlled and must comply with federal and state emissions laws when used on public roads."
Chevy LS3 Aluminum Cylinder Head
Upgrade your GM LS with bare aluminum cylinder heads engineered to improve airflow, combustion efficiency, and horsepower potential. Featuring 260cc intake runners, 68.4cc combustion chambers, these heads are built for street, strip, and performance engine builds that need better breathing than stock castings.
Improved Airflow & Power Potential
Optimized runner and chamber design helps move more air through the engine, improving throttle response, torque, and top-end horsepower potential across the RPM range.
Bare Head Build Flexibility
Bare cylinder head configuration gives builders the flexibility to select valves, springs, retainers, and hardware matched to the exact camshaft, RPM range, and power goal.
Aluminum Construction
Lightweight aluminum construction reduces weight compared to factory iron heads while improving heat dissipation for more consistent performance under demanding conditions.
Built for Street & Performance Builds
Ideal for performance rebuilds, restorations, and upgraded engine combinations. Always verify piston-to-valve clearance, camshaft compatibility, intake manifold fit, and header clearance before final installation.
COMPATIBLE WITH
GM LS SERIES V8 ENGINES - RECTANGULAR PORT
• 6.0L / 364 in³ (L76, L77, L98)
• 6.2L / 376 in³ (LS3, L92, L99, L9H)
• 7.0L / 427 in³ (LS7 requires application-specific verification)
COMMON VEHICLE APPLICATIONS
Chevrolet Corvette (LS3 equipped)
Chevrolet Camaro (LS3 / L99 equipped)
Chevrolet SS / Pontiac G8 (LS3 / L76 equipped)
Cadillac CTS-V applications using compatible LS architecture
GM trucks and swaps using rectangular-port LS cylinder heads
NOTES
Designed for rectangular-port LS intake manifold applications.
Verify intake manifold, rocker arm, valve cover, head gasket bore, and head bolt/stud compatibility before installation.
Cylinder head sold individually (purchase quantity of 2 required for complete engine).
Not compatible with cathedral-port LS intake manifolds, Gen V LT direct-injection engines, Gen I SBC, or Big Block Chevy engines.
Specifications:
Assembled: No
Combustion Chamber Style: Heart
Combustion Chamber Volume: 68.4 cc
Cylinder Head Finish: Natural
Cylinder Head Material: Aluminum
Exhaust Port Location: Standard
Exhaust Port Shape: D-port
Intake Port Location: Standard
Intake Port Shape: Cathedral
Intake Runner: 260 cc
Quantity: Sold Individually
Valve Guide Material: Bronze
