6.4 HEMI Engine for Sale: Everything You Need to Know

If you’re a car enthusiast, mechanic, or someone looking to upgrade your vehicle’s powertrain, the 6.4 HEMI engine is likely on your radar. Known for its powerful performance and robust engineering, the 6.4 HEMI engine delivers impressive horsepower and torque that can dramatically transform your driving experience.

This article will provide a comprehensive overview of the 6.4 HEMI engine for sale — its specifications, benefits, where to buy, pricing, and tips for purchasing. Whether you’re seeking a crate engine, a used replacement, or a rebuilt 6.4 HEMI, this guide covers all aspects to help you make an informed decision.

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What is a 6.4 HEMI Engine?

The 6.4 HEMI engine, also known as the 392 HEMI, is a naturally aspirated V8 engine developed by Chrysler. It is part of the HEMI family, named after its hemispherical combustion chamber design which enhances airflow and combustion efficiency.

Key Specifications:

• Displacement: 6.4 liters (392 cubic inches)

• Configuration: V8, naturally aspirated

• Horsepower: Approximately 485 hp to 500 hp (varies by application)

• Torque: Around 475 lb-ft

• Fuel System: Multi-point fuel injection

• Compression Ratio: About 10.9:1

• Block & Heads: Cast iron block with aluminum cylinder heads

The 6.4 HEMI engine was introduced in 2011 and has been used in a variety of Chrysler, Dodge, and Jeep vehicles, including:

• Dodge Charger SRT 392

• Dodge Challenger SRT 392

• Jeep Grand Cherokee SRT

• Dodge Durango SRT

This engine offers a remarkable balance of power, durability, and refinement, making it a favorite among performance lovers.

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Why Choose a 6.4 HEMI Engine?

The 6.4 HEMI is not just about raw power. It brings multiple benefits that appeal to those looking to upgrade or replace their engine:

1. Exceptional Performance

The 6.4 HEMI delivers significant horsepower and torque that improves acceleration, towing, and overall driving dynamics. Its performance is ideal for muscle car fans or those seeking a powerful SUV engine.

2. Durability and Reliability

Built with high-quality materials such as a forged steel crankshaft and forged pistons, the 6.4 HEMI is engineered to last. It withstands the rigors of high-performance driving and heavy loads.

3. Aftermarket Support

Because of its popularity, there is a vast aftermarket ecosystem offering performance upgrades, tuning solutions, and replacement parts, allowing owners to customize their engines to specific needs.

4. Versatility

The 6.4 HEMI fits a range of vehicles and applications, including swaps into classic muscle cars, trucks, or Jeeps, making it a versatile choice for engine enthusiasts.

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Types of 6.4 HEMI Engines for Sale

When searching for a 6.4 HEMI engine for sale, you will encounter several options. Understanding these will help you choose the best one for your project.

1. Brand New Crate Engines

Crate engines are fully assembled engines sold directly from manufacturers or distributors. They come with warranty coverage and are ideal for those seeking a turnkey solution.

• Pros: Warranty, brand new components, guaranteed performance

• Cons: Higher price compared to used or rebuilt engines

2. Rebuilt or Remanufactured Engines

These engines have been disassembled, cleaned, and rebuilt with new or refurbished parts to meet OEM standards. They often come with limited warranties.

• Pros: More affordable than new crate engines, reliable if rebuilt by reputable shops

• Cons: Varying quality depending on rebuilder, shorter warranty

3. Used Engines

Used engines come from salvage vehicles or engine pull-outs. Prices are lowest, but these engines come with no guarantee unless tested.

• Pros: Cheapest option

• Cons: Unknown history, wear and tear, potential reliability issues

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Where to Buy a 6.4 HEMI Engine

There are several trusted sources to buy a 6.4 HEMI engine:

1. Authorized Dealers and OEM Suppliers

Manufacturers and official distributors offer brand-new crate engines and OEM parts.

• Examples: Mopar Performance, Dodge dealers, Summit Racing

2. Performance and Specialty Shops

Performance shops often stock rebuilt or crate 6.4 HEMI engines tailored for muscle cars or off-road vehicles.

• Examples: Jegs, LMR (Late Model Restoration), B&M Performance

3. Online Marketplaces

Websites like eBay Motors, Craigslist, and specialized forums provide a range of used and rebuilt engines. Be cautious and verify the seller’s credibility.

4. Local Salvage Yards

Salvage yards and auto recyclers often have engines pulled from wrecked vehicles. Ideal for budget builds but requires due diligence.

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Pricing of the 6.4 HEMI Engine

Pricing varies based on condition, type, and source.

Note: Additional costs may include shipping, installation, and accessories such as engine mounts, wiring harnesses, and ECU tuning.

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Tips for Buying a 6.4 HEMI Engine

To ensure a successful purchase, keep these tips in mind:

1. Verify Engine Compatibility

Ensure the engine matches your vehicle’s year, model, and transmission to avoid compatibility issues.

2. Ask for Engine History

For used or rebuilt engines, request maintenance and rebuild records, mileage, and test results.

3. Inspect the Engine or Request Photos

Check for signs of wear, leaks, rust, or damage. For remote purchases, request detailed photos or videos.

4. Understand the Warranty Terms

Review warranty coverage, including duration and what components are covered.

5. Consider Additional Parts and Labor

Account for installation labor, replacement gaskets, fluids, and tuning costs.

6. Buy from Reputable Sellers

Check reviews, ratings, and feedback to avoid scams or low-quality engines.

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Installing and Maintaining Your 6.4 HEMI Engine

Proper installation and maintenance are crucial for maximizing the lifespan and performance of your 6.4 HEMI.

Installation

• Professional installation recommended: The 6.4 HEMI is a complex engine requiring precise mounting, connections, and calibration.

• Tune the ECU: After installation, ECU tuning may be necessary to optimize fuel delivery and performance.

• Check all systems: Ensure the cooling system, exhaust, and electrical wiring are compatible and in good condition.

Maintenance Tips

• Regular oil changes: Use synthetic oils recommended by the manufacturer.

• Inspect cooling system: Keep the radiator, hoses, and water pump in good condition.

• Use quality fuel: Premium fuel can enhance performance and engine longevity.

• Scheduled tune-ups: Spark plugs, filters, and sensors should be replaced as per maintenance schedule.

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Popular Vehicles Using the 6.4 HEMI Engine

If you are considering an engine swap or looking for a vehicle with this engine, here are some popular models:

• Dodge Challenger SRT 392 (2011-present)

• Dodge Charger SRT 392 (2011-present)

• Jeep Grand Cherokee SRT (2012-2021)

• Dodge Durango SRT (2018-present)

• Ram 2500/3500 (with 6.4L HEMI V8, heavy-duty trucks)

These vehicles benefit from the engine’s high power and torque for both street performance and towing capacity.

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Frequently Asked Questions About the 6.4 HEMI Engine

Q1: Is the 6.4 HEMI engine good for daily driving?

Yes, the 6.4 HEMI balances power and smooth operation, making it suitable for daily driving, though fuel economy will be lower compared to smaller engines.

Q2: Can I use the 6.4 HEMI engine for a classic muscle car swap?

Absolutely! Many enthusiasts swap the 6.4 HEMI into classic Mopars or other muscle cars for modern power and reliability.

Q3: How does the 6.4 HEMI compare to the 5.7 HEMI?

The 6.4 HEMI provides more horsepower and torque, making it better for high-performance applications, but it consumes more fuel.

Q4: What kind of fuel does the 6.4 HEMI require?

Premium gasoline (91 octane or higher) is recommended for optimal performance and engine health.

Q5: Can the 6.4 HEMI engine handle forced induction like superchargers?

Yes, many tuners add superchargers or turbochargers to the 6.4 HEMI for extreme power gains, but modifications should be done carefully.