Description
454 7.4L Crate Engine For Sale USA
– High-Performance 454 LSX Engine
454 7.4L Crate Engine For Sale USA
454 7.4L Crate Engine For Sale USA is one of the most powerful big-cubic-inch combinations developed around the LSX architecture. Displacing 454 cubic inches (7.4 liters), the LSX454 combines large displacement with a high-strength LSX cast-iron block, forged rotating components and performance-oriented cylinder heads.
For American muscle car builders, street-and-strip projects, race cars and high-performance custom builds, the LSX454 offers the advantage of substantial displacement in an LS-based engine package.
At Forged & Stocked Engines, we help customers looking for high-performance engines identify the right LSX454 configuration for their vehicle, project and intended use.
What Is the LSX454?
The LSX454 is a Gen IV LSX-series small-block V8 with 454 cubic inches of displacement. Unlike the traditional Chevrolet 454 big-block, the LSX454 uses the LSX architecture and was engineered to provide big-displacement performance in a comparatively compact LS-based package.
GM documentation for the LSX454 lists a 4.185-inch bore and 4.125-inch stroke, an LSX cast-iron block, forged 4340 steel crankshaft and connecting rods, forged aluminum pistons, hydraulic roller camshaft and aluminum LSX/LS7-port cylinder heads.
The earlier Chevrolet Performance LSX454 configuration was rated around 620–627 horsepower, depending on the specific configuration and test setup, with torque figures around 586–590 lb-ft.
Important: LSX454 specifications can vary by part number, configuration and production period. Buyers should verify the exact engine part number and specification before purchasing.
454 7.4L Crate Engine For Sale USA Specifications
| Specification | LSX454 |
|---|---|
| Engine Type | LSX-Series Gen IV Small-Block V8 |
| Displacement | 454 cu. in. / 7.4L |
| Bore | 4.185 in. / 106.3 mm |
| Stroke | 4.125 in. / 104.8 mm |
| Block | LSX Cast Iron |
| Main Caps | Six-bolt, cross-bolted |
| Crankshaft | 4340 Forged Steel |
| Connecting Rods | 4340 Forged Steel |
| Pistons | Forged Aluminum |
| Cylinder Heads | Aluminum LSX/LS7 Port |
| Compression Ratio | Approximately 11.0:1 on the classic LSX454 configuration |
| Camshaft | Hydraulic Roller |
| Valve Lift | Approximately 0.648 in. intake/exhaust |
| Rocker Ratio | 1.8:1 |
| Reluctor | 58X |
| Balance | Internally Balanced |
| Recommended RPM | Up to approximately 6,500 RPM on classic configuration |
| Fuel | Premium gasoline |
GM’s published LSX454 documentation lists the 4.185 x 4.125-inch bore/stroke combination, 11.0:1 compression ratio, forged 4340 crankshaft and rods, forged aluminum pistons, hydraulic roller camshaft and 58X reluctor.
LSX454 Horsepower and Torque
One of the biggest reasons enthusiasts search for an LSX454 crate engine for sale is its combination of displacement and power.
The classic Chevrolet Performance LSX454 configuration was advertised at approximately:
- 620 horsepower
- 590 lb-ft of torque
- 454 cubic inches / 7.4 liters
- Naturally aspirated performance
- 6,500 RPM maximum recommended engine speed
GM’s historical Chevrolet Performance catalog lists 620 hp at 6,200 rpm and 590 lb-ft at 4,800 rpm for the LSX454 configuration.
Some later LSX454 long-block listings show approximately 627 hp and 586 lb-ft, illustrating why it is important to identify the exact part number and configuration when comparing LSX454 engines.
Forged LSX454 Internal Components
A major attraction of the LSX454 is its performance-oriented rotating assembly.
The classic LSX454 specification includes:
Forged 4340 Steel Crankshaft
The LSX454 uses a forged 4340 steel crankshaft designed for high-performance applications. The crankshaft also uses an eight-bolt flange, making the correct flexplate or flywheel selection particularly important during an engine swap.
Forged Connecting Rods
Forged 4340 steel connecting rods provide the strength required for a high-output 454-cubic-inch LS combination.
Forged Aluminum Pistons
The classic LSX454 uses forged aluminum pistons with an approximately 11.0:1 compression ratio configuration.
LSX Cast-Iron Block
The LSX cast-iron block features six-bolt, cross-bolted main caps, providing a strong foundation for high-performance engine applications.
LSX454 Cylinder Heads
The LSX454 uses aluminum performance cylinder heads based around the LSX/LS7-port architecture.
The published specifications include:
- 70cc combustion chambers
- 2.200-inch titanium intake valves
- 1.610-inch hollow, sodium-filled exhaust valves
- 1.8:1 rocker-arm ratio
- Six-bolt cylinder-head attachment
These features are designed to support strong airflow and high-RPM performance.
LSX454 vs. Traditional Chevrolet 454 Big Block
The LSX454 is often compared with the traditional Chevrolet 454 big-block because both engines use the iconic 454-cubic-inch displacement.
However, they are fundamentally different engine architectures.
| Feature | LSX454 | Traditional 454 Big Block |
|---|---|---|
| Displacement | 454 cu. in. | 454 cu. in. |
| Architecture | LSX Gen IV Small-Block | Chevrolet Big Block |
| Block | LSX Cast Iron | Big-Block Chevrolet |
| Cylinder Heads | LSX/LS7-style aluminum | Application dependent |
| Crankshaft | Forged 4340 | Application dependent |
| Fuel System | Configuration dependent | Configuration dependent |
| Technology | Modern LS architecture | Earlier-generation architecture |
| Swap Potential | Excellent for LS-based builds | Traditional big-block applications |
The LSX454 was specifically developed to deliver big-block-style displacement and performance while retaining the packaging advantages of an LS-based engine architecture. GM’s historical material describes it as a 21st-century 454 built around the LSX platform.
Who Should Buy an LSX454 Crate Engine?
An LSX454 can be an excellent choice for customers building:
- Chevrolet muscle cars
- Pro-touring vehicles
- Street-and-strip cars
- Drag racing vehicles
- Custom hot rods
- High-performance trucks
- Restomod projects
- Custom LS engine swaps
- Race and competition vehicles
- High-power naturally aspirated builds
Before ordering, buyers should confirm engine dimensions, accessory compatibility, transmission compatibility, oil-pan clearance, fuel system requirements, ECU requirements and vehicle-specific installation requirements.
LSX454 Engine Swap Considerations
Installing an LSX454 is more involved than simply replacing an existing engine with another engine of the same family.
Depending on the vehicle, the project may require:
Engine Mounts
The correct engine mounts are necessary to position the LSX454 correctly in the chassis.
Oil Pan
Certain LSX454 configurations require a compatible oil pan and related components. Historical GM documentation specifically notes that some LSX454 assemblies require the purchase and installation of an oil pan.
Intake and Fuel System
The exact intake manifold and fuel-delivery system depend on whether the engine is configured for carburetion or electronic fuel injection.
Ignition and Electronics
Older LSX454 configurations may require specific ignition-control hardware. GM documentation notes that certain carbureted configurations require an LSX ignition controller.
Transmission
Because the LSX454 produces substantial torque, the transmission, clutch or torque converter, driveshaft and rear differential should be selected to match the intended power level.
Cooling System
A suitable radiator, electric fans, coolant hoses and cooling strategy should be used for the vehicle and intended operating conditions.
Is the LSX454 Good for Naturally Aspirated Performance?
Yes. The large 454-cubic-inch displacement makes the LSX454 particularly attractive for naturally aspirated performance builds.
Its large displacement provides strong torque without requiring forced induction. With the appropriate intake, exhaust, fuel system, calibration and supporting components, the engine can be configured for serious street, drag racing and competition applications.
For customers planning to add a supercharger, turbocharger or nitrous system, the complete engine specification should be evaluated first. Compression ratio, fuel system, ECU calibration, cylinder pressure and the intended power target all need to be considered.
LSX454 Crate Engine for Sale USA
If you are searching for an LSX454 7.4L crate engine for sale in the USA, it is important to compare more than just the advertised horsepower.
At Forged & Stocked Engines, buyers should confirm:
- Exact engine part number
- New, rebuilt or used condition
- Long-block or complete-engine configuration
- Cylinder-head specification
- Crankshaft and rotating assembly specification
- Intake manifold availability
- Fuel-system configuration
- ECU/ignition requirements
- Oil-pan configuration
- Warranty availability
- Shipping method
- Delivery location
- Compatibility with the customer’s vehicle
Because LSX454 configurations can differ, customers should provide their vehicle information and intended application before finalizing an engine purchase.
LSX454 Shipping Across the USA
A complete crate engine is a heavy automotive component and should be packaged appropriately for transportation.
Depending on the engine configuration and destination, shipping may involve:
- Heavy-duty engine packaging
- Wooden crate or pallet
- Protective wrapping
- Freight transportation
- Residential or commercial delivery
- Liftgate service where applicable
- Tracking information
For customers ordering an LSX454 engine, we recommend confirming the delivery address and unloading capability before shipping.
Why Choose Forged & Stocked Engines?
Forged & Stocked Engines focuses on connecting performance-engine buyers with engines and components suited to demanding automotive applications.
Wide Engine Selection
We offer access to a range of performance engines, including LS, LSX, LT, HEMI, Coyote and other high-performance platforms.
Performance-Focused Options
Our engine selection is aimed at customers building muscle cars, restomods, race cars, trucks and custom performance vehicles.
Detailed Specifications
We provide technical information to help customers compare displacement, horsepower, torque, compression ratio and internal components.
USA Buyer Support
We focus on making the engine-buying process easier for customers purchasing performance engines in the United States.
Shipping Assistance
We can help customers understand available engine shipping and freight requirements based on their destination.
Technical Assistance
Choosing the correct crate engine involves more than horsepower. Vehicle compatibility, transmission, electronics, fuel system and intended use all matter.
Frequently Asked Questions About the LSX454
How much horsepower does an LSX454 make?
The classic Chevrolet Performance LSX454 configuration was rated at approximately 620 horsepower and 590 lb-ft of torque. Other configurations and later long-block versions have different published outputs, so the exact part number should be verified.
How many liters is an LSX454?
The LSX454 has 454 cubic inches of displacement, equivalent to approximately 7.4 liters.
Is the LSX454 a big-block?
No. Despite its 454-cubic-inch displacement and big-block-style performance, the LSX454 is an LSX Gen IV small-block V8 architecture.
Is the LSX454 forged?
The classic LSX454 specification includes a forged 4340 steel crankshaft, forged 4340 steel connecting rods and forged aluminum pistons.
What is the LSX454 compression ratio?
The classic LSX454 configuration is listed at 11.0:1 compression ratio. Exact specifications should be confirmed against the engine’s part number.
What is the bore and stroke of the LSX454?
The LSX454 uses a 4.185-inch bore and 4.125-inch stroke.
Can I put an LSX454 in a street car?
It can be used in suitable custom street and performance builds, but legality, emissions requirements, vehicle compatibility and the specific engine configuration should be checked before installation. Some Chevrolet Performance LSX454 configurations are intended for competition/off-road applications rather than emissions-certified street use.
Does the LSX454 come with everything needed for an engine swap?
Not necessarily. Depending on the specific crate-engine configuration, additional components such as an intake manifold, oil pan, ignition/electronics, fuel system, accessories and vehicle-specific installation parts may be required.
Order an LSX454 7.4L Crate Engine
Looking for an LSX454 7.4L crate engine for sale in the USA?
Contact Forged & Stocked Engines with your vehicle year, make, model, transmission, intended use and desired power level. We can help you identify the appropriate LSX454 configuration and the supporting components required for your project.
Request an LSX454 engine quote today and tell us what vehicle you are building.
Final Thoughts
The LSX454 7.4L crate engine combines 454 cubic inches of displacement with the modern LSX architecture and a performance-oriented forged rotating assembly. For builders who want substantial naturally aspirated power, strong torque and a high-performance LS foundation, the LSX454 remains an attractive engine platform.
Whether you’re building a Chevrolet muscle car, restomod, street-and-strip vehicle, race car or custom LS swap, choosing the correct LSX454 configuration is essential.
For U.S. buyers searching for an LSX454 crate engine for sale, always verify the exact part number, engine condition, included components, intended-use restrictions, warranty and shipping details before purchasing.
Forged & Stocked Engines — Performance Engines for Serious Builds.
Reviews
There are no reviews yet.