Description
Step up to genuine SRT power with the Mopar® Performance 392 CID 6.4L Gen III HEMI® Engine. Factory-rated at 485 horsepower and 475 lb-ft of torque in manual transmission configuration, this engine platform eliminates the failure-prone factory MDS (Multi-Displacement System) hardware, delivering a simplified, robust valvetrain foundation engineered for high-RPM durability in performance builds.
Important Configuration Note: Long Block Assembly (Not Turnkey)
This assembly is a core long block consisting of the short block and assembled cylinder heads with valvetrain. It requires a timing cover, water pump, oil pan, valve covers, intake manifold, throttle body, sensors, exhaust manifolds/headers, and accessory drive components to complete the installation in your vehicle.
NOTE: Exhaust manifolds are not included. Knowledge and execution of any powertrain control integration, accessory drive selection, and chassis modifications are solely the responsibility of the installer.
| Specification | Detail |
|---|---|
| Engine Type | 392 CID (6.4L) Gen III HEMI® (Non-MDS) |
| Horsepower | 485 HP @ 6,100 RPM* |
| Torque | 475 lb-ft @ 4,100 RPM |
| Compression Ratio | 10.9:1 |
| Bore x Stroke | 4.090" Bore x 3.720" Stroke (103.9mm x 94.6mm) |
| Engine Block | Deep-skirt cast iron with cross-bolted 4-bolt powder-metal main caps |
| Crankshaft | Forged steel, 94.6mm stroke |
| Connecting Rods & Pistons | Forged powdered metal I-beam rods; forged aluminum alloy pistons |
| Cylinder Heads | A356-T6 aluminum, hemispherical combustion chambers (Apache Architecture) |
| Valves (Int / Exh) | 54.3mm (2.14") hollow-stem intake / 42.0mm (1.65") sodium-filled exhaust |
| Camshaft Type | Hydraulic roller (Non-MDS profile) |
| Peak RPM | 6,400 RPM |
*Output rating achieved when paired with proper calibration and standalone engine management.
Warranty Information: This is a VIN-specific replacement long block for manual transmission Dodge Challengers. When installed in factory-matching applications with verified VIN, standard Mopar replacement warranty rules apply. Any other retro-fit, custom swap, or off-highway applications will carry a 90-day parts-only limited warranty.
Long Block Inclusions:
- Cylinder heads fully assembled with valves, springs, and retainers
- Cast iron 6.4L Gen III HEMI® engine block
- Forged steel crankshaft
- Connecting rods and wrist pins
- Pistons and piston ring sets
- Performance non-MDS hydraulic roller camshaft
- Non-MDS hydraulic roller lifters
Recommended Installation & Accessory Components:
- P/N 77072448: Power Steering Add-On Kit
- P/N 77072492: Front End Accessory Drive (FEAD) Kit
- P/N 77072493: A/C Expansion Kit
- P/N 302-61: Holley Gen III HEMI Mid-Sump Swap Oil Pan
Details
Shipping Information
- H25.00"
