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Chevrolet Performance Ls 376/515 Ls3 Long Block Crate Engines 19370412
$4.800
The Chevrolet Performance LS 376/515 LS3 Long Block (19370412) is a high-performance LS3 small block V8 crate engine designed for muscle cars, street rods, and performance builds.
Delivering up to 515 horsepower, this long block provides reliable, factory-tested performance and a ready-to-install solution.
The LS 376/515 LS3 Long Block (Part #19370412) combines modern LS3 technology with Chevrolet Performance reliability, making it ideal for enthusiasts who want high horsepower and consistent performance.
This long block includes:
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Cylinder block
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Cylinder heads
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Rotating assembly
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Valve train
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Oil pan
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Timing cover
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Valve covers
Performance Overview:
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LS3 small block V8 architecture
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376 C.I.D. (6.2L) displacement
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515 horsepower output
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Fully assembled long block, ready for installation
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Ideal for muscle cars, street rods, and restomods
Key Features
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Chevrolet Performance LS3 6.2L small block V8
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Fully assembled long block
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Factory-tested for durability and high-performance
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High-flow cylinder heads and forged components
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Direct-fit for LS3-compatible Chevrolet vehicles
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Suitable for performance, restomods, and street builds
Key Technical Specifications
| Specification | Details |
|---|---|
| Brand | Chevrolet Performance |
| Part Number | 19370412 |
| Engine Type | LS3 Small Block V8 |
| Configuration | Long Block |
| Displacement | 6.2L / 376 C.I.D. |
| Horsepower | 515 Hp |
| Torque | Approx. 470 lb-ft (Check Manufacturer) |
| Block Material | Aluminum |
| Cylinder Heads | Aluminum, high-flow |
| Crankshaft | Forged Steel |
| Connecting Rods | Forged Steel |
| Pistons | Forged Aluminum |
| Camshaft Type | Hydraulic Roller |
| Fuel System | Not Included |
| Fuel Type | Gasoline |
| Ignition System | Not Included |
| Cooling System | Water-Cooled |
| Condition | Brand New / Factory-Tested |
| Country of Origin | United States |
| Included Components | Cylinder block, heads, valve train, rotating assembly, oil pan, timing cover, valve covers |
| Recommended Use | Muscle cars, street rods, LS3 restomods, performance builds |
Compliance & Disclaimer
Horsepower and torque values should be verified with Chevrolet Performance specifications.
Professional installation and proper break-in procedures are recommended.
Not certified for emissions-controlled vehicles.
Questions & Answers
Have a question about this product? Ask below — we’ll reply as soon as possible.
Return & Refund Policy
- Return Period: Within 30 days of delivery.
- Condition: Unused, original packaging, all accessories included.
- Non-Returnable: Gift cards, personal care, custom or digital items, sale items.
- How to Return: Email support@fastoutboard.com for RMA and return address.
- Shipping: Customer pays unless item is faulty or incorrect.
- Refund: Processed within 5–10 business days after inspection.
Warranty
- Coverage: 1-Year limited warranty for manufacturing defects.
- Excludes: Misuse, wear, or unauthorized repair.
- Claim: Email proof and photos to support@fastoutboard.com.
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