Chevrolet Performance LS 376/515 LS3 Long Block Crate Engine – 533 HP | PN 19370412
Unleash 533 HP of Pump-Gas Power with This Aggressive LS3 Long Block
Looking for an LS3 crate engine that delivers raw power, bulletproof durability, and modern EFI-delete muscle? The Chevrolet Performance LS 376/515 Long Block Crate Engine (PN 19370412) is the perfect solution — packing 533 horsepower and 477 lb-ft of torque with a carbureted intake manifold and Chevy’s aggressive “Hot Cam.”
This factory-assembled LS3-based long block offers everything you love about GM’s 6.2L architecture — including aluminum block and heads, hydraulic roller valvetrain, and wet sump oiling — all designed to run strong on pump gas.
And yes — it ships within 5 to 7 business days and includes Chevrolet’s limited warranty for peace of mind.
⚙️ Key Features & Technical Specs
| Feature | Specification |
|---|---|
| Engine Family | Chevy LS (LS3-Based) |
| Displacement | 6.2L / 376 C.I.D. |
| Horsepower | 533 HP |
| Torque | 477 lb-ft |
| Compression Ratio | 10.7:1 |
| Camshaft | Hydraulic roller – Chevrolet Hot Cam |
| Cylinder Heads | Aluminum LS3 rectangular port – 68cc |
| Intake Manifold | Included – Carbureted style |
| Fuel System | Requires carburetor (not included) |
| Block Material | Aluminum |
| Crankshaft | Nodular iron |
| Connecting Rods | Powder metal |
| Pistons | Hypereutectic |
| Oil System | Wet sump (oil pan included) |
| Rear Main Seal | 1-piece |
| Balance | Internal |
✅ Spark plugs, valve covers, timing cover, water pump, and harmonic balancer included.
🛠️ What’s NOT Included (Customize Your Setup)
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Carburetor
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Distributor
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Throttle body
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Flexplate or flywheel
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Spark plug wires
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ECU & wiring harness
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Air cleaner
🔧 This gives you the flexibility to finish the build your way — especially useful for drag, hot rods, or Pro Touring where you already have high-end accessories.
Shipping & Warranty Info
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Ships in 5 to 7 business days from date of payment confirmation
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Covered by Chevrolet Performance’s limited warranty
Covers 24 months or 50,000 miles for eligible applications (check terms for racing use)
Ideal For:
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Street rods
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Drag cars
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Classic muscle cars
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Carbureted LS swaps
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Restomod builds
✅ If you’re upgrading from a small block or Gen I engine, the LS 376/515 offers massive gains with a modern platform.
🏁 LS3 Crate Engine Comparison Table
| Model | HP / Torque | Fuel Delivery | Included Intake | Best Use Case |
|---|---|---|---|---|
| LS3 430 HP Crate Engine | 430 / 425 lb-ft | EFI | EFI | Daily driver, restomod |
| LS376/525 Crate Engine | 525 / 486 lb-ft | EFI | EFI | Pro Touring, track days |
| LS 376/515 Long Block (THIS) | 533 / 477 lb-ft | Carbureted | Yes | Drag racing, aggressive street car |
| Blueprint LS3 473 HP Dressed | 473 / 450 lb-ft | EFI | Yes | Turnkey swaps, weekend cruiser |
🔍 Frequently Asked Questions (FAQ)
Is this a complete engine?
No. It is a long block assembly with several major components (oil pan, intake, water pump, etc.), but you must add a carburetor, distributor, and ignition system.
Can I run this on pump gas?
Yes! The engine is built with a 10.7:1 compression ratio and runs great on 91+ octane pump fuel.
What makes it different from a standard LS3?
The LS376/515 uses the Chevrolet Performance Hot Cam and a carb-style intake to deliver more aggressive power and old-school feel — perfect for non-EFI builds.
Is this engine good for racing?
Absolutely. With 533 HP, it’s ideal for bracket racers and high-performance street cars. However, check your warranty terms if used in competitive motorsports.
How soon will it ship?
Orders typically ship within 5 to 7 business days after payment is confirmed.
