About the 392 Hemi Engine

Looking for power and performance that's ready to roar? A used 392 Hemi engine might just be your ticket to thrilling drives and serious horsepower. Known for its 470 to 485 HP V8 muscle in SRT applications, the Chrysler Apache 6.4L V8 (badged "392" in honor of the legendary 1957 Hemi) delivers exhilarating acceleration and a deep, satisfying exhaust note that's unmistakably American Mopar. Whether you're upgrading your Charger, Challenger, Grand Cherokee SRT, restoring a 300 SRT8, completing a Mopar swap project, or sourcing a powerplant for a Ram 2500 / 3500 heavy-duty work truck, this engine offers the heart-pounding performance and iconic sound that Hemi enthusiasts crave. Unlock the potential of your vehicle with a 392 Hemi and experience the road like never before.

Engine Overview: The Apache 6.4L V8 (Badged "392 Hemi")

Unleash the roar of the 392 Hemi engine, the Chrysler Apache 6.4L V8 renowned for its thrilling performance and iconic American Hemi muscle car character. With its impressive horsepower (470 to 485 HP in SRT trim, 410 HP in HD truck trim) and substantial torque, this engine delivers exhilarating acceleration and a deep, resonant exhaust growl that commands attention. Whether you're upgrading your modern Mopar performance vehicle or completing a custom restoration project, the 392 Hemi offers unmatched naturally-aspirated V8 power and a legendary driving experience.

A Note on the "392" Name and Heritage

The modern 6.4L Hemi is officially the Apache 6.4L V8, but it's badged as "392 Hemi" in honor of the legendary original 1957 to 1958 Chrysler 392 cubic inch Hemi V8 that powered the Chrysler 300 letter cars and provided the technical foundation for the famous 426 Hemi muscle car engines of the 1960s. The naming is heritage-driven: the modern 6.4L actually displaces 391 cubic inches (not exactly 392), but Chrysler rounded the badge up to evoke the original 392 Hemi heritage. When you buy a "392 Hemi," you're buying the modern Apache 6.4L V8 with a heritage badge connecting it to one of the most famous engine names in American automotive history.

Two Distinct 392 Hemi Variants

The 392 Hemi exists in two distinct power configurations. Choosing the correct variant for your application is essential:

SRT Performance Variant (Most Common 392 Hemi)

Used in performance cars and SUVs, the SRT variant produces 470 to 485 HP and 470 to 475 lb-ft at higher RPM. Key characteristics:

• More aggressive cam timing for high-RPM power
• Performance-tuned ECM calibration
• High-flow intake manifold and Active Exhaust system
• Cold-air intake with high-flow filter element
• 91 octane premium fuel recommended
• Used in:
• Dodge Challenger SRT 392 / Scat Pack (2011 to current)
• Dodge Charger SRT 392 / Scat Pack (2014 to current)
• Jeep Grand Cherokee SRT (2012 to current)
• Jeep Wrangler 392 (2021 to current)
• Chrysler 300 SRT8 (2012 to 2014 US market, continued in international markets)

HD Truck Variant

Used in Ram heavy-duty trucks, the HD variant produces 410 HP and 429 lb-ft with emphasis on low-end torque and longevity rather than peak power. Key characteristics:

• Milder cam timing for broader torque curve
• Work-truck ECM calibration
• Different intake manifold and exhaust system optimized for towing
• Heavy-duty oil cooler and cooling system
• Designed for 100,000 plus mile commercial service life
• Used in:
• Ram 2500 Heavy Duty (2014 plus, the gas alternative to the 6.7 Cummins diesel)
• Ram 3500 Heavy Duty (2014 plus)
• Ram 4500 / 5500 Chassis Cab (2014 plus, medium-duty work trucks)
• Ram ProMaster commercial van applications

When ordering, specify whether you need the SRT performance variant or the HD truck variant. These engines share the same Apache 6.4L block but have substantially different cam timing, calibration, and accessory configurations.

Important Note: The Ram 1500 TRX Does NOT Use the 392 Hemi

A common source of confusion: the Ram 1500 TRX (2021 to current) uses a supercharged 6.2L Hellcat V8 producing 702 HP, NOT the 392 Hemi. While the TRX and 392 are both modern Stellantis V8 platforms, they are completely different engines. If you're sourcing for a Ram 1500 TRX, you need a supercharged 6.2L Hellcat, not the 392. Call (240) 301-0095 to inquire about Hellcat / Redeye / Demon engine availability.

Features of the 392 Hemi (Apache 6.4L V8)

• Hemispherical Combustion Chambers: The Hemi-design heads with their characteristic hemispherical combustion chambers provide excellent flame propagation and high-flow capability, the architectural feature that has defined the Hemi engine family since the 1950s.
• OHV Pushrod Valvetrain: Classic pushrod design with 2 valves per cylinder (16 valves total). The OHV configuration keeps the engine compact and provides excellent low-end torque characteristics.
• Cast Iron Block: The heavy-duty Apache block uses cast iron construction for durability under sustained high-load operation, particularly important for the HD truck variants used in towing applications.
• Aluminum Cylinder Heads: Lightweight aluminum heads with hemispherical combustion chambers provide excellent thermal characteristics and weight savings versus iron heads.
• FuelSaver MDS (Multi-Displacement System): Cylinder deactivation system that runs the engine on 4 cylinders during light-load cruising for improved fuel economy. Some HD truck variants may have MDS disabled.
• High-Flow Intake (SRT Variant): SRT versions use a larger plenum and runners for high-RPM breathing.
• Active Exhaust (SRT Variant): Variable exhaust system with valve-controlled bypass for performance / sport / track modes.
• Sequential Multi-Port Fuel Injection: Precise fuel delivery for both efficiency and high-output performance.

Performance Potential

The 392 Hemi engine offers serious power right out of the box and significant aftermarket upgrade potential:

Stock Performance (SRT Variant):

• 470 to 485 HP at the crank
• 425 to 440 wheel HP typical on dyno
• 470 to 475 lb-ft of torque
• 0 to 60 MPH in 4.2 to 4.5 seconds (Challenger / Charger SRT 392)

Aftermarket Upgrade Potential:

• Bolt-ons (intake, exhaust, tune): 525 to 575 wheel HP
• Cam upgrade: 600 to 650 wheel HP
• Heads and cam: 700 plus wheel HP
• Stroker builds: 800 to 1,000 plus HP achievable
• Supercharger / turbo kits: 1,000 plus HP achievable (similar architecture to the Hellcat platform)

Why Choose a 392 Hemi?

The 392 Hemi engine stands out in the modern V8 market:

• Naturally aspirated character: Linear power delivery without turbo lag or supercharger belt-driven heat issues
• Strong aftermarket support: Extensive performance parts catalog from Mopar Performance and aftermarket vendors
• Hemi heritage: Connection to the legendary 1950s Hemi V8 family and 1960s muscle car history
• Dual application: Available in both performance car SRT trim and heavy-duty truck trim
• Robust internals: Cast iron block and forged crankshaft provide good baseline strength for power adders

Why Choose a Used 392 Hemi Engine?

Opting for a used 392 Hemi engine offers several advantages over alternatives:

• Cost-effective alternative to new ($5,999 used vs $11,500 to $15,000 new crate)
• Cost-effective alternative to reman ($5,999 used vs $7,500 to $11,000 reman)
• Proven Hemi reliability with over 13 years of production refinement (2011 plus)
• Wide availability of parts and aftermarket support
• Potential for significant power upgrades through the extensive Mopar performance ecosystem

Find Your Perfect 392 Hemi Engine Today

Whether you're replacing a worn engine in your Challenger SRT 392, completing a Charger Scat Pack rebuild, swapping a 392 into a project car, or sourcing a workhorse for your Ram 2500 work truck, our selection of used 392 Hemi engines for sale has you covered. With options spanning both SRT performance and HD truck variants, you're sure to find the right engine for your specific application.

Browse our inventory of 392 Hemi engines for sale now, or contact our team for personalized recommendations matching your specific year, body code, and variant. Experience the power and Hemi heritage in your vehicle. Your journey to enhanced performance starts here!

Vehicle Compatibility

Condition and Inspection

• Variant identified (SRT performance vs HD truck)
• Donor vehicle confirmed (Challenger / Charger SRT, Grand Cherokee SRT, 300 SRT8, Ram 2500/3500 HD, etc.)
• Power output documented (470 to 485 HP SRT or 410 HP HD)
• Year of production identified
• All 8 cylinders compression tested
• Oil pressure verified at cold and warm operation
• FuelSaver MDS function checked where equipped
• Aluminum cylinder head castings inspected for cracks (hemispherical combustion chambers visually inspected)
• Block casting numbers documented
• Active Exhaust system condition noted on SRT variants
• Intake manifold variant identified (high-flow SRT vs HD truck standard)
• Mileage from donor noted
• SRT vs HD truck variant correctly identified
• Donor vehicle history documented
• All 8 cylinders compression tested before shipping
• Power output verified to match listed specification
• Block and head casting numbers documented
• Free freight pallet delivery to all 50 states
• 15 day replacement warranty on internal defects
• Mopar / Stellantis experienced support team
• Cross-reference assistance for Hellcat 6.2 / Redeye / Demon if buyers need supercharged variants