Ford Flathead Aluminum Cylinder Head
Ford Flathead Aluminum Cylinder Head
SKU: SKU: JM4325
In stock

Product Details
Features
- Fits Ford Flathead V8 applications; verify year, displacement and head style before ordering
- Performance port and chamber design improves airflow and horsepower 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 Ford Flathead with bare aluminum cylinder heads engineered to improve airflow, combustion efficiency, and horsepower potential. Featuring performance-focused port, chamber, and valve specifications, 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 |
| Cylinder Head Finish | Natural |
| Cylinder Head Material | Aluminum |
| Exhaust Port Location | Standard |
| Intake Port Location | Standard |
| Quantity | Sold Individually |
Engine Fitment
COMPATIBLE WITH
FORD FLATHEAD V8 ENGINES
• 3.6L / 221 in³
• 3.9L / 239 in³
• 4.2L / 255 in³
COMMON VEHICLE APPLICATIONS
Ford passenger cars (1939–1948 Flathead V8 equipped)
Ford trucks using compatible Flathead V8 engines
Hot rod and vintage Ford Flathead builds
Offenhauser-style Flathead cylinder head applications (where listed)
NOTES
Verify year range, head style, gasket selection, and cooling passage compatibility before installation.
Cylinder head sold individually.
Not compatible with Ford Small Block Windsor, FE, Coyote, or Big Block Ford engines.
Q&A
What engines are these cylinder heads compatible with?
These cylinder heads are designed for COMPATIBLE WITH, Ford Flathead V8, NOTES.
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 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."
Ford Flathead Aluminum Cylinder Head
Upgrade your Ford Flathead with bare aluminum cylinder heads engineered to improve airflow, combustion efficiency, and horsepower potential. Featuring performance-focused port, chamber, and valve specifications, 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
FORD FLATHEAD V8 ENGINES
• 3.6L / 221 in³
• 3.9L / 239 in³
• 4.2L / 255 in³
COMMON VEHICLE APPLICATIONS
Ford passenger cars (1939–1948 Flathead V8 equipped)
Ford trucks using compatible Flathead V8 engines
Hot rod and vintage Ford Flathead builds
Offenhauser-style Flathead cylinder head applications (where listed)
NOTES
Verify year range, head style, gasket selection, and cooling passage compatibility before installation.
Cylinder head sold individually.
Not compatible with Ford Small Block Windsor, FE, Coyote, or Big Block Ford engines.
Specifications:
Assembled: No
Cylinder Head Finish: Natural
Cylinder Head Material: Aluminum
Exhaust Port Location: Standard
Intake Port Location: Standard
Quantity: Sold Individually