What is included with this Edelbrock LS3 long block?

This is a long block assembly only. It includes the GM LS3 aluminum block, forged Manley crankshaft, forged Manley H-beam connecting rods, forged aluminum pistons, GM cylinder heads with Edelbrock valve springs, camshaft, and rocker arms. It does not include the induction system, exhaust manifolds, or external accessories.

What kind of power can this engine make?

When used as the foundation for Edelbrock's E-Force supercharged crate engine, it produces upwards of 720 horsepower and 695 ft-lbs. of torque on 91 octane pump gas. The actual output will depend on the induction system and other components you pair it with.

What is the warranty on this engine?

Edelbrock provides a 2-year warranty with unlimited mileage on this LS3 long block engine, offering peace of mind for your performance build.

Edelbrock Crate Engine LS3 Long Block Only

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Specifications

Brand: Edelbrock
Part #: 46720
UPC: 85347467204

Edelbrock Crate Engine LS3 Long Block Only

Name: Edelbrock Crate Engine LS3 Long Block Only
Brand: Edelbrock
SKU: edelbrock-edelbrock-crate-engine-ls3-long-block-only-t14-126177
Price: 23582.25 USD
Availability: BackOrder

$23582.25

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Edelbrock Crate Engine LS3 Long Block Only. A strong foundation for a high-performance build.

Key Features

This is the same long-block engine used in Edelbrock's E-Force supercharged crate engine.
Features a lightweight GM LS3 aluminum block.
Displacement is 416 cubic inches with a 4.065" bore and 4" stroke.
Includes forged Manley crankshaft, forged Manley H-beam connecting rods, and forged aluminum pistons.
Compression ratio is 9.5:1, suitable for forced induction builds.
Comes with GM cylinder heads equipped with Edelbrock valve springs (#5768).

This engine is designed for Small-Block Gen IV LS3 416 (6.8L) Chevrolet applications. It is a compact design intended for a seamless swap into most platforms.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Product Details

If you're building a serious performance vehicle and need a robust foundation, this Edelbrock LS3 long block is designed for that purpose. It's the same core engine used in their E-Force supercharged crate engine, capable of handling significant power when paired with the right components. This engine is built around a lightweight GM LS3 aluminum block and is expanded to a 416 cubic inch displacement.

Inside, you'll find a full suite of forged internals from Manley: a balanced crankshaft, H-beam connecting rods, and aluminum pistons. This setup is designed for strength and durability, ready to accept forced induction like a supercharger or turbocharger. The compression ratio is set at 9.5:1, which is ideal for boosted applications. It comes with GM cylinder heads fitted with Edelbrock valve springs, and an LS3 camshaft with a 215 intake and 247 exhaust duration, .629/.656 lift, and a 121 LSA. The engine is finished in a black powder coat for a clean look and includes LS3 rocker arms with a 1.7 ratio.

This is a long block only, meaning it does not include the induction system (intake manifold, fuel injectors, throttle body), exhaust manifolds, or accessories like the water pump or alternator. It's intended as a base for custom builds where you'll select those components yourself. Edelbrock backs this engine with a 2-year warranty with unlimited mileage, giving you confidence in its construction for your project.