6.4L HEMI V8 Engine

The 6.4L HEMI V8 Engine, widely known as the 392 HEMI, is one of Mopar’s most recognised modern performance V8 engines. Combining classic HEMI architecture with modern fuel injection and engine-management technology, the 6.4L delivers strong performance, substantial torque and excellent potential for performance and custom applications.

The engine has been used across a variety of Dodge, Jeep and Ram vehicles, with specifications varying according to the vehicle, model year and intended application.

Engine Specifications

• Engine: 6.4L HEMI V8
• Common designation: 392 HEMI
• Displacement: 6.4L / 392 cubic inches
• Configuration: 90-degree V8
• Aspiration: Naturally aspirated
• Valvetrain: OHV / pushrod
• Cylinder heads: Aluminium
• Fuel system: Electronic fuel injection
• Valve technology: Variable valve timing on applicable versions
• MDS: Available on selected applications
• Performance: Varies according to engine specification and vehicle application

Performance

The 6.4L HEMI is engineered to provide a combination of strong horsepower and substantial torque. In high-performance passenger-car applications such as the Dodge Challenger and Charger Scat Pack, factory versions have produced approximately 485 horsepower and 475 lb-ft of torque.

Output can differ for truck, SUV and other applications, so the exact engine specification should always be confirmed before purchase.

Popular Applications

The 6.4L HEMI V8 has been offered in various Dodge, Jeep and Ram applications, including:

• Dodge Challenger R/T Scat Pack
• Dodge Charger R/T Scat Pack
• Dodge Challenger SRT 392
• Dodge Charger SRT 392
• Jeep Grand Cherokee SRT
• Jeep Grand Cherokee Trackhawk-related performance platforms
• Ram 2500
• Ram 3500
• Other Mopar performance and truck applications

Ideal For

A 6.4L HEMI V8 can be suitable for:

• Engine replacement
• Performance upgrades
• Dodge and Mopar builds
• Jeep performance projects
• Ram applications
• Classic car restomods
• Custom engine swaps
• Restoration projects
• High-performance vehicle builds

HEMI Performance Platform

One of the major advantages of the 6.4L HEMI platform is its strong aftermarket ecosystem. The engine has been widely supported by performance specialists, making it a popular foundation for customers looking to develop a naturally aspirated or modified V8 powertrain.

Depending on the intended project, supporting components may include a compatible transmission, ECU/PCM, wiring harness, engine mounts, cooling system, fuel system, exhaust and driveshaft.

Compatibility & Specification

Not every 6.4L HEMI engine is identical. Passenger-car, SUV and truck versions can differ in areas such as:

• Engine calibration
• Compression ratio
• Intake system
• Cylinder heads
• Camshaft specification
• Oil pan configuration
• Accessory arrangement
• Fuel system
• ECU/PCM
• Wiring
• MDS configuration
• Transmission compatibility

For this reason, customers should confirm the engine code, donor vehicle, model year and intended application before ordering.

At Prime Motor Ltd, we provide performance engines and automotive powertrain solutions for replacement, restoration and custom-build projects.

Prime Motor Ltd — Performance Engines & Automotive Solutions