Description

6.4L 392ci HEMI Long Block Crate Engine – Power, Performance & Reliability
Introduction

When it comes to unadulterated American muscle, few names are more revered than HEMI. Loathed for their combination of reliability, displacement, and head-turning power, HEMI crate engines have long been the builder, restorer, and performance enthusiast’s first choice. Of them, the 6.4L 392ci HEMI Long Block Crate Engine is a behemoth that combines cutting-edge Mopar technology with iconic V8 prowess.

Whether your goal is to upgrade your Dodge Challenger, give a Ram truck a new lease on life, or create a custom hot rod, the 392 HEMI long block is built to deliver. Though some builders use the lower-cost 5.7 HEMI Long Block Crate Engine, those who want maximum horsepower and torque tend to turn to the 6.4L HEMI for that extra step in performance.

Product Overview

A long block crate engine is the optimal compromise between engine swaps and performance builds. A long block is already pre-assembled with the block, heads, valvetrain, and internal components, compared to a short block. This means less time searching for individual pieces and more time putting your project on the road.

The 6.4L 392ci HEMI Long Block Crate Engine arrives fully assembled with Mopar’s factory precision, guaranteeing unparalleled durability and dependability. It’s the ideal starting point for everything from street machines to Saturday track killers. Whether installing it to replace a worn-out stock motor or stepping up from a 5.7 HEMI long block crate engine, this 392ci bruiser delivers the added oomph to make your build stand out.

Technical Specifications & Features

392 HEMI long block isn’t just displacement—it’s an exquisitely engineered performance machine. Some of the most important features are:

Displacement: 6.4 liters (392 cubic inches)

Horsepower: Around 485 hp (dependent on configuration)

Torque: About 475 lb-ft

Compression Ratio: 10.9:1 for high efficiency and high power output

Block Material: Cast-iron block with aluminum cylinder heads

Fuel System: Multi-port fuel injection compatibility

Durability: Forged steel crankshaft, heavy-duty connecting rods, and high-strength pistons

This union of design and engineering makes the 6.4L 392ci HEMI Long Block Crate Engine not only drivable every day but also adaptable to high-performance upgrades such as the use of aftermarket cams, headers, or even forced induction setups.

Advantages of Performance of the 6.4L 392ci HEMI

The 6.4L HEMI isn’t just about more numbers on paper—it’s about real-world performance. Its greater displacement is accompanied by a significant increase in both horsepower and torque over smaller engines. It means better acceleration, greater towing capacity, and more power throughout the rev band.

For enthusiasts who love to push their vehicles, the 392ci HEMI long block offers a strong platform for future mods. Add a performance intake, tune, or supercharger, and you’ll unleash even more potential from this engine.

6.4L vs. 5.7 HEMI Long Block Crate Engine

One of the most asked questions is which to pick between the 6.4L HEMI or the 5.7 HEMI Long Block Crate Engine. Both are solid options, but it ultimately comes down to your build intention.

5.7 HEMI Long Block Crate Engine: Less expensive, widely used on Ram 1500 trucks and street builds. Provides up to 370 hp and 395 lb-ft of torque, making it a reliable choice for daily performance.

6.4L 392ci HEMI Long Block Crate Engine: Offers a lot more power—nearly 100 more horses—ideal for performance enthusiasts, muscle car projects, and high-output use.

As a daily driver with moderate performance needs, the 5.7 HEMI long block is an adequate option. But if maximum performance is your goal, the 6.4L 392ci HEMI is a hands-down choice.

Installation & Compatibility

One of the greatest advantages of buying a Mopar long block is that it is compatible. The 6.4L HEMI is an excellent choice for:

Dodge Challenger & Charger modifications

Chrysler 300 constructions

Ram 2500 and 3500 trucks (under proper tuning and installation)

Classic muscle car resto-mods and hot rod builds

Even though it’s typically a drop-in for newer Mopar vehicles, there are some instances that may require ECU modifications, wiring harness restoration, and transmission modification. Mating the engine with the correct drivetrain accessories enables you to maximize its potential.

Price & Value

A 6.4L 392ci HEMI Long Block Crate Engine purchase will typically cost more upfront than a 5.7 HEMI, but its value is irrefutable.

Average Price Range: $6,500 – $9,000 depending on supplier and configuration.

Warranty: Many Mopar long blocks are backed by factory warranties for customer peace of mind.

Value: Using a crate engine, as opposed to rebuilding an older engine, brings reliability, less downtime, and brand-new parts that can withstand the performance expectations of today.

For the high-performance enthusiast who demands long-term durability, the 392ci HEMI is one of the best values available in the crate engine market.

Customer Benefits & Use Cases

Who should use the 6.4L HEMI long block?

Performance Enthusiasts: For individuals who want more power from their Charger or Challenger.

Truck Owners: Ram owners needing more torque to tow or use in off-road situations.

Restorers: Classic car restorers who want up-to-date Mopar reliability with retro appearances of a muscle car.

Custom Builders: Hot rodders who wish the best combination of reliability and power.

Why Buy From Us?

When you purchase your 6.4L 392ci HEMI Long Block Crate Engine from our shop, you’re not purchasing an engine—you’re investing in support and quality.

Mopar factory-spec long blocks.
New and remanufactured engines priced competitively.
Expert customer service to assist with compatibility questions.
Peace of mind backed by warranty.

Don’t take a chance on your build with unknown sellers. Choose a supplier that delivers performance and reliability.

Conclusion

The 6.4L 392ci HEMI Long Block Crate Engine is the perfect blend of uninhibited power and state-of-the-art engineering. With nearly 500 horsepower at your command, rugged durability, and Mopar’s legendary build quality, it’s the ultimate answer for Dodge, Ram, and custom use.

For those who want dependable power at a lower cost, the 5.7 HEMI Long Block Crate Engine remains an excellent alternative. But if your goal is maximum performance, the 392 HEMI is in a league of its own.

Upgrade your build today—experience the performance, reliability, and thrill that only a Mopar HEMI long block can deliver.