6.2 LS3 Engine for Sale: Everything You Need to Know

If you’re a car enthusiast, mechanic, or performance junkie looking to upgrade your ride, the 6.2 LS3 engine is one of the most sought-after powerplants on the market today. Known for its impressive power, reliability, and versatility, the LS3 engine has become a favorite among muscle car fans, hot rodders, and custom builders alike.

In this article, we will dive deep into everything you need to know about the 6.2 LS3 engine for sale — from its features and performance specs to where to buy it, what to expect in pricing, and how to choose the right engine for your project.

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What is the 6.2 LS3 Engine?

The LS3 engine is part of General Motors’ LS family of V8 engines. It was first introduced in 2008 and quickly became popular due to its excellent power output and durability. The LS3 is a 6.2-liter (376 cubic inches) small-block V8 engine that delivers significant horsepower and torque, making it an ideal upgrade for muscle cars, trucks, and even some sports cars.

Key Specs of the LS3 Engine:

• Displacement: 6.2 liters (376 cubic inches)

• Configuration: V8

• Horsepower: 430–436 hp (varies by application)

• Torque: 424–428 lb-ft

• Compression Ratio: 10.7:1

• Fuel System: Sequential Fuel Injection (SFI)

• Block Material: Cast aluminum

• Cylinder Heads: Aluminum with high-flow intake ports

The LS3 engine was famously used in vehicles like the Chevrolet Corvette C6 and the Camaro SS, and it remains a top choice for engine swaps and performance builds.

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Why Choose the 6.2 LS3 Engine?

The LS3 engine offers several advantages that make it a compelling choice for performance enthusiasts:

1. High Power Output

With 430-436 horsepower straight from the factory, the LS3 provides plenty of muscle for street driving, drag racing, or even track use. Its torque curve also makes it very responsive and fun to drive.

2. Lightweight Design

Thanks to its aluminum block and heads, the LS3 engine is lighter than many other V8s in its power class, which improves handling and balance in the vehicle.

3. Aftermarket Support

The LS engine family has one of the largest aftermarket communities, meaning you’ll find tons of performance parts, upgrade kits, and custom solutions for the LS3 engine.

4. Reliability

GM’s LS series has a proven reputation for durability and long life, making it a dependable option for both street and race applications.

5. Versatility

The LS3 can fit a variety of vehicles with the right engine mounts and adapters, making it a popular choice for engine swaps in muscle cars, trucks, and even off-road vehicles.

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Types of 6.2 LS3 Engines for Sale

When shopping for a 6.2 LS3 engine, you will encounter different options based on condition, modifications, and intended use. Here are the common types available on the market:

1. New LS3 Engines

These are factory-new engines, typically sold by GM Performance or authorized dealers. They come with full warranties and are built to original specs, perfect for a fresh build or reliable swap.

2. Remanufactured/Rebuilt LS3 Engines

A remanufactured LS3 is a previously used engine that has been fully disassembled, cleaned, inspected, and rebuilt with new or refurbished parts to meet or exceed OEM specifications. This option is usually more affordable than new but still reliable.

3. Used LS3 Engines

Used engines come straight off vehicles and are sold as-is. While they are the cheapest option, they come with varying degrees of wear and no guarantees, so buyer caution is advised.

4. Modified/Tuned LS3 Engines

Some sellers offer LS3 engines that have been upgraded with aftermarket parts such as camshafts, cylinder heads, or forced induction. These engines offer higher performance but may have reduced longevity and require more maintenance.

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Where to Buy a 6.2 LS3 Engine for Sale

Finding the right place to buy a 6.2 LS3 engine can affect price, reliability, and your overall satisfaction. Here are some popular options:

1. Authorized GM Dealers and Performance Centers

If you want a brand new LS3 engine with warranty, your best bet is to go through official GM sources or certified performance engine builders.

2. Reputable Online Retailers

Websites like Summit Racing, Jegs, and Lingenfelter Performance offer new and remanufactured LS3 engines with shipping nationwide.

3. Specialty Engine Builders and Rebuilders

Some companies specialize in rebuilding LS3 engines and offer various build options from stock replacements to fully modified race engines.

4. Online Marketplaces and Classifieds

Sites like eBay Motors, Craigslist, and Facebook Marketplace often list used LS3 engines at competitive prices. However, buyer beware — verify the engine condition and seller reputation before purchase.

5. Salvage Yards

Salvage yards or junkyards sometimes have LS3 engines pulled from wrecked cars. This is a low-cost option but carries risk and often requires rebuilding.

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How Much Does a 6.2 LS3 Engine Cost?

The price of a 6.2 LS3 engine can vary widely depending on the type, condition, and included accessories. Here’s a general price breakdown as of 2025:

Additional Costs to Consider:

• Shipping fees

• Installation costs (if you’re not installing yourself)

• Additional components (wiring harness, ECU, intake manifold, etc.)

• Engine management or tuning software

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Things to Consider Before Buying a 6.2 LS3 Engine

Before you jump into purchasing a 6.2 LS3 engine, here are a few important considerations:

1. Intended Use

Are you building a daily driver, a weekend racer, or a show car? Your goals affect the type of LS3 you should buy (stock vs. modified).

2. Compatibility

Make sure the engine you purchase fits your vehicle or swap plan, including motor mounts, transmission compatibility, and electronics.

3. Warranty and Return Policy

Always check the warranty offered by the seller and understand their return policies in case the engine doesn’t meet your expectations.

4. Additional Parts Needed

Many LS3 engines come as crate engines with everything included, but some might be “bare blocks” or missing components like the intake manifold, throttle body, or wiring harness.

5. Engine History

If buying used, ask about mileage, maintenance history, and any issues the engine had.

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How to Verify the Authenticity and Quality of an LS3 Engine

Since LS3 engines are popular and in demand, counterfeits and misrepresented engines exist in the market. Here’s how to avoid getting scammed:

• Check the VIN: Genuine GM LS3 engines have specific serial numbers and VINs that can be traced back to the factory.

• Ask for Documentation: Request receipts, service records, or dyno sheets if the engine is modified.

• Inspect the Engine: Look for casting marks and GM part numbers on the block and heads.

• Test Compression: If possible, ask for a compression test or have a mechanic inspect the engine.

• Buy from Reputable Sellers: Choose sellers with good ratings and verified customer feedback.

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Top Benefits of Swapping Your Car with a 6.2 LS3 Engine

Upgrading your vehicle with an LS3 engine can offer numerous benefits:

1. Massive Power Boost

Replacing an older or less powerful engine with an LS3 will give your car a serious power increase.

2. Improved Reliability

Modern LS engines are known for their robustness and longevity.

3. Better Fuel Efficiency

Compared to older V8s, the LS3 uses more efficient fuel injection and better design, which can improve MPG.

4. Aftermarket Upgradability

Future performance upgrades are easy and well-supported.

5. Resale Value

Cars with LS3 engine swaps tend to have better resale value among enthusiasts.

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Frequently Asked Questions (FAQs)

Q1: Can I swap a 6.2 LS3 engine into any car?

A: While the LS3 is versatile, engine swaps require compatible mounts, transmission adapters, and sometimes custom wiring and tuning. Popular swap candidates include classic muscle cars, trucks, and some imports with modifications.

Q2: How much horsepower can I get out of an LS3 with modifications?

A: With basic bolt-ons like an aftermarket cam, intake, and exhaust, you can push the LS3 beyond 500 hp. Forced induction (superchargers or turbochargers) can raise output well above 700 hp.

Q3: Is the LS3 better than the LS1 or LS2?

A: Yes, the LS3 offers higher displacement, improved cylinder heads, and better flow, making it a more powerful and efficient engine compared to LS1 or LS2.

Q4: What transmission pairs well with the LS3?

A: The LS3 is compatible with several transmissions including the Tremec T56 manual, GM 4L60E/4L80E automatics, and aftermarket options.