Description
6.4 HEMI 392 Engine for Sale USA – Specs, Performance & Buying Guide
Looking for a 6.4 HEMI 392 engine for sale in the USA? The 392 HEMI is one of the most recognizable modern American performance V8 engines, offering large displacement, strong torque and naturally aspirated performance.
The 6.4-liter HEMI is commonly known as the 392 HEMI because its displacement is approximately 392 cubic inches. The factory Mopar 392 crate-engine specification is rated at 485 horsepower and 475 lb-ft of torque. It uses a 103.9 mm bore, 94.6 mm stroke, 10.9:1 compression ratio and a 6,400-RPM peak rating.
For customers looking for a 392 HEMI crate engine, replacement engine, used 6.4 HEMI or performance engine, choosing the correct configuration is essential.
What Is the 6.4 HEMI 392 Engine?
The 6.4 HEMI 392 is a Gen III HEMI V8 with approximately 392 cubic inches of displacement.
The engine became particularly well known through high-performance Dodge and Jeep applications, including Challenger, Charger and Grand Cherokee SRT models, as well as Scat Pack vehicles and later Wrangler 392 applications.
The 392 combines large displacement with a naturally aspirated design, making it attractive to customers who want responsive V8 power without adding a turbocharger or supercharger.
For engine-swap and performance applications, however, buyers should understand that different 6.4L HEMI versions can have differences in electronics, accessories, oil pans, intake systems, emissions equipment and vehicle integration.
6.4 HEMI 392 Engine Specifications
| Specification | 6.4 HEMI 392 |
|---|---|
| Engine Type | Gen III HEMI V8 |
| Displacement | 392 cu. in. / 6.4L |
| Configuration | V8 |
| Bore | 103.9 mm |
| Stroke | 94.6 mm |
| Crankshaft | Forged Steel |
| Block | Cast Iron |
| Connecting Rods | Powdered Metal, Floating Pin |
| Pistons | Hypereutectic Aluminum |
| Cylinder Heads | Aluminum HEMIspherical |
| Compression Ratio | 10.9:1 |
| Factory Crate Output | 485 HP |
| Factory Crate Torque | 475 lb-ft |
| Peak RPM | 6,400 RPM |
| Fuel | Premium Recommended |
These figures refer specifically to the documented 392 crate-engine configuration and should not automatically be applied to every production 6.4L HEMI from every model year.
392 HEMI Crate Engine
A 392 HEMI crate engine is a popular option for builders who want a performance-oriented engine assembly without starting with a bare engine block.
The documented Mopar 392 crate-engine package includes components such as the water pump, flywheel and clutch, front-sump oil pan, intake manifold with throttle body, fuel injectors and coil packs.
However, crate-engine contents can vary according to the exact part number and supplier. Always confirm what is included before purchasing.
Depending on your project, you may be looking for:
- Complete 392 HEMI crate engine
- 6.4L HEMI long block
- Used 392 HEMI engine
- Low-mileage 6.4 HEMI pullout
- Rebuilt 392 HEMI
- Forged 392 HEMI
- Engine with accessories
- Engine with wiring harness
- Engine and ECU package
- Complete engine-swap package
6.4 HEMI 392 Performance
One of the biggest advantages of the 392 HEMI is its combination of displacement and naturally aspirated performance.
The factory 392 crate configuration produces 485 horsepower and 475 lb-ft of torque, giving builders a strong starting point for muscle cars, restomods, performance vehicles and engine-swap projects.
The engine’s 103.9 mm bore and 94.6 mm stroke provide the 392-cubic-inch displacement, while the forged-steel crankshaft and aluminum HEMIspherical cylinder heads are important components of the factory configuration.
Vehicles That Use the 6.4 HEMI
The 6.4L HEMI has been used in a variety of high-performance Chrysler, Dodge, Jeep and Ram applications.
Depending on model year and configuration, applications include:
- Dodge Challenger SRT 392
- Dodge Challenger R/T Scat Pack
- Dodge Charger SRT 392
- Dodge Charger R/T Scat Pack
- Jeep Grand Cherokee SRT
- Jeep Wrangler Rubicon 392
- Dodge Durango SRT
- Chrysler 300 SRT
- Other specialty and performance applications
The exact engine configuration can vary between vehicles. Therefore, a buyer should provide the vehicle year, model and VIN where appropriate before ordering a replacement or swap engine.
6.4 HEMI 392 Engine Swap
The 392 HEMI is also popular for engine swaps and restomod projects.
A successful 6.4 HEMI swap may require more than the engine itself. Depending on the vehicle, customers may need:
- Engine mounts
- Engine wiring harness
- ECU/PCM
- Throttle pedal
- Fuel system
- Fuel injectors
- Exhaust headers
- Cooling system
- Radiator
- Transmission
- Transmission controller
- Driveshaft
- Compatible oil pan
- Accessory drive
- Custom exhaust
- Engine tuning
The exact requirements depend on the vehicle receiving the engine.
New vs. Used 392 HEMI Engine
When searching for a 392 HEMI engine for sale, buyers generally consider new crate engines, used engines and rebuilt or performance-built engines.
New 392 HEMI Crate Engine
A new crate engine can be an excellent choice for a performance build when the buyer wants a documented engine assembly with known specifications.
Advantages may include:
- New engine assembly
- Known specifications
- No unknown donor-vehicle history
- Suitable for performance builds
- Easier documentation
- Potentially easier installation planning
Used 6.4 HEMI Engine
A used 6.4 HEMI can be a more economical option for customers replacing a damaged engine or completing a project on a budget.
Before buying a used engine, ask about:
- Engine identification
- Donor vehicle
- Mileage, if known
- Compression testing
- Leak-down testing, where available
- Oil-pressure information
- Engine photos
- Running video, where available
- Included accessories
- ECU availability
- Wiring harness availability
- Warranty
Rebuilt or Forged 392 HEMI
A rebuilt or forged 392 HEMI may be appropriate for customers planning higher-performance applications.
Performance-built engines can use upgraded internal components such as forged pistons, forged connecting rods, upgraded fasteners and performance-oriented balancing and machine work.
The exact specifications should always be matched to the intended horsepower, RPM, fuel and forced-induction requirements.
How Much Does a 6.4 HEMI 392 Engine Cost?
The price of a 6.4 HEMI 392 engine varies significantly depending on condition, configuration, mileage, included components and whether the engine is new, used, rebuilt or performance-built.
As a historical reference, Mopar’s Direct Connection catalog listed the 392 crate HEMI at $9,600 in the cited catalog. Current market pricing can be different, so buyers should request a current quotation rather than relying on an old catalog price.
When comparing prices, determine whether the engine includes:
- Intake manifold
- Throttle body
- Fuel injectors
- Coil packs
- Water pump
- Flywheel
- Clutch
- Oil pan
- Starter
- Alternator
- Wiring harness
- ECU
- Sensors
- Other accessories
A lower advertised engine price does not necessarily represent the lowest total project cost.
What to Check Before Buying a 392 HEMI Engine
Before purchasing a 6.4 HEMI 392 engine for sale in the USA, provide the supplier with as much information about your project as possible.
1. Vehicle Year and Model
Tell the seller exactly which vehicle will receive the engine.
2. Engine Type
Confirm whether you need a production 6.4L HEMI, 392 crate engine, long block, used pullout or forged performance engine.
3. Transmission
Identify the transmission you plan to use because transmission compatibility can affect the required components.
4. ECU and Wiring
Modern HEMI swaps often require appropriate ECU, wiring, throttle-control and security-system solutions.
5. Oil Pan
Oil-pan configuration is especially important for engine swaps because chassis and crossmember clearance can vary.
6. Accessories
Confirm whether the engine comes with accessories or whether they must be purchased separately.
7. Intended Use
Tell the supplier whether the engine is intended for:
- Street use
- Drag racing
- Track use
- Restomod
- Engine swap
- Off-road
- Competition
6.4 HEMI Emissions and Street-Legal Considerations
U.S. buyers should pay particular attention to emissions requirements when purchasing a crate engine for a street-driven vehicle.
The cited Direct Connection catalog states that the 392 crate HEMI was designed for installation in vehicles manufactured before model year 1976 or in competition vehicles, and warns that installing it in newer vehicles used on public roads may violate applicable emissions laws.
Because emissions requirements can vary by state and vehicle, customers should verify the applicable federal, state and local regulations before purchasing an engine for street use.
This is especially important for customers in states with stricter emissions requirements.
Why Choose a 6.4 HEMI 392?
The 392 HEMI is attractive to performance enthusiasts because it offers:
- 6.4-liter displacement
- Naturally aspirated V8 performance
- Strong torque
- 485 HP in the documented factory crate configuration
- 475 lb-ft of torque
- Forged-steel crankshaft
- Aluminum HEMIspherical cylinder heads
- Strong aftermarket support
- Excellent engine-swap potential
- Proven American V8 performance
For customers seeking a powerful naturally aspirated American V8, the 6.4 HEMI 392 remains a strong option.
Buy a 6.4 HEMI 392 Engine in the USA
Looking for a 6.4 HEMI 392 engine for sale in the USA?
Forged & Stocked Engines can help customers identify the right engine configuration for replacement, restoration, performance and engine-swap projects.
Before requesting a quotation, provide:
- Vehicle year
- Make and model
- Current engine
- Desired 6.4 HEMI configuration
- Transmission
- Intended use
- New or used preference
- Complete engine or long-block requirement
- Shipping ZIP code
Our team can help determine which 392 HEMI engine configuration is most appropriate for your project.
Request a 392 HEMI Engine Quote
Forged & Stocked Engines
Performance Engines • Replacement Engines • Engine Swap Solutions
Email: forgedandstockedengine@gmail.com
Contact Forged & Stocked Engines for 6.4 HEMI 392 engine availability, specifications, package contents, shipping options and compatibility information.
Frequently Asked Questions About the 6.4 HEMI 392
Is the 6.4 HEMI the same as the 392 HEMI?
The terms are commonly used for the same 6.4-liter HEMI family. The “392” designation refers to the engine’s approximate 392-cubic-inch displacement.
How much horsepower does a 392 HEMI have?
The documented Mopar 392 crate HEMI specification produces 485 horsepower and 475 lb-ft of torque. Production vehicle versions can have different output ratings depending on application and model year.
Is the 392 HEMI naturally aspirated?
Yes. The standard 6.4L 392 HEMI is a naturally aspirated V8.
What is the bore and stroke of a 392 HEMI?
The documented 392 crate-engine specification uses a 103.9 mm bore and 94.6 mm stroke.
What is the compression ratio of the 392 HEMI?
The documented crate-engine specification has a 10.9:1 compression ratio.
Is the 392 HEMI good for an engine swap?
Yes. The 6.4 HEMI is widely used for performance and swap projects. However, engine mounts, electronics, oil-pan configuration, cooling, fuel delivery, transmission compatibility and emissions requirements must be considered.
Does a 392 HEMI crate engine include the ECU?
Not necessarily. The contents depend on the exact engine package and part number. Confirm whether an ECU/controller, wiring harness and other electronics are included before ordering.
Is a 392 HEMI legal for street use?
Street legality depends on the specific engine, vehicle, model year and location. The Direct Connection documentation includes specific restrictions for its crate-engine configuration, so buyers should verify applicable emissions and vehicle regulations before installation.
Final Thoughts
The 6.4 HEMI 392 is one of the most popular modern American performance V8 platforms, combining 392 cubic inches of displacement with strong naturally aspirated performance.
The documented Mopar 392 crate configuration delivers 485 horsepower and 475 lb-ft of torque, with a forged-steel crankshaft, 103.9 mm bore, 94.6 mm stroke and 10.9:1 compression ratio.
Whether you are searching for a 392 HEMI crate engine, used 6.4 HEMI, replacement engine, rebuilt 392 or performance-built HEMI, make sure the engine configuration matches your vehicle and intended application.
Looking for a 6.4 HEMI 392 engine for sale in the USA? Contact Forged & Stocked Engines today for availability, specifications and a quotation.
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