Product Overview
Step up to the pinnacle of modern V8 performance with the Chevrolet Performance LS3 6.2L crate engine. As the factory-engineered heart of the C6 Corvette and Camaro SS, this turn-key assembly delivers a certified 525 horsepower and 486 lb-ft of torque straight from the crate. This isn’t a modified or rebuilt engine; it’s a brand-new, complete assembly built to the exacting standards of General Motors, offering unmatched reliability and a seamless installation experience for your project.
The LS3’s all-aluminum construction keeps weight down, while its high-flow, rectangular-port cylinder heads—borrowed from the legendary LS7—and aggressive hydraulic roller camshaft ensure breathtaking power from idle to redline. This engine comes remarkably complete, including the electronic fuel injection intake manifold, 90mm throttle body, fuel injectors, ignition coils with wires, and even exhaust manifolds. This “connect-and-play” configuration drastically reduces the parts list and complexity for your swap.
Whether you’re modernizing a classic car, building a pro-touring masterpiece, or creating a high-performance kit car, the Chevrolet Performance LS3 is the benchmark for power, weight, and modern engineering. It represents a worry-free investment in genuine GM quality and performance.
Technical Specifications
| Specification Category | Detail |
|---|---|
| Manufacturer Part Number | 19435104 |
| Engine Type | GM Gen IV LS-Series V8 |
| Displacement | 6.2L / 376 cu. in. |
| Max Horsepower (HP) | 525 HP @ 6,200 RPM |
| Max Torque (lb-ft) | 486 lb-ft @ 5,200 RPM |
| Compression Ratio | 10.7:1 |
| Engine Block Material | Aluminum |
| Crankshaft | Nodular Iron |
| Connecting Rods | Powdered Metal |
| Pistons | Hypereutectic |
| Cylinder Head Material | Aluminum (LS7-style Rectangular Port) |
| Camshaft Type | Hydraulic Roller |
| Camshaft Specs | .525″/.525″ Lift, 226°/236° Duration @ .050″ |
| Fuel System | Electronic Fuel Injection (Components Included) |
| Throttle Body | 90mm (Included) |
| Balance | Internal |
| Rear Main Seal | 1-Piece |
What’s Included (Complete Assembly)
| Included | Not Included / Required Separately |
|---|---|
| ✓ Fully Assembled Long Block | ✗ Engine Control Module (ECU) |
| ✓ EFI Intake Manifold | ✗ Wiring Harness |
| ✓ Fuel Injectors | ✗ Flexplate / Flywheel (14″ Flexplate IS Included) |
| ✓ 90mm Throttle Body | �Clutch & Flywheel for Manual Trans |
| ✓ Ignition Coil Packs, Wires, & Spark Plugs | ✗ Air Cleaner Assembly |
| ✓ Exhaust Manifolds | ✗ Engine Mounts (Vehicle Specific) |
| ✓ Aluminum Water Pump | ✗ Fuel Pump & Lines |
| ✓ Harmonic Balancer | |
| ✓ Valve Covers & Timing Cover | |
| ✓ Oil Pan |
Note: The product specifications from Summit Racing initially state “Flexplate Included: No,” but the detailed description from Chevrolet Performance explicitly lists a “14 in. flexplate” as included. The Chevrolet Performance description is considered the authoritative source here.
Comparison Table: Chevrolet LS3 vs. Alternatives
| Feature | Chevrolet Performance LS3 (19435104) | BluePrint Engines LS3 | ATK Remanufactured LS |
|---|---|---|---|
| Origin & Warranty | New, Factory GM w/ GM Warranty | New, Aftermarket w/ BPE Warranty | Remanufactured w/ ATK Warranty |
| Block & Components | All-New GM Production Parts | New Aftermarket Castings & Components | Remanufactured OEM Core |
| Power Rating | 525 HP (GM Certified) | Similar (e.g., 525-550 HP) | Varies |
| Included Components | Very Complete (EFI, Ignition, Manifolds) | Varies (Often Long Block) | Typically Long Block Only |
| Ideal For | Purists, OEM Reliability, Resale Value | Performance Enthusiasts, Value | Budget-Conscious Swaps |
| Key Differentiator | Unmatched OEM Quality & Support | Customizable Options | Lower Initial Cost |
Frequently Asked Questions (FAQs)
Q1: What is needed to make this engine run in my vehicle?
A: You will need an Engine Control Module (ECU) and a corresponding engine wiring harness programmed for this specific LS3. You will also need a fuel system capable of delivering ~58 psi, engine mounts for your chassis, exhaust piping, and a transmission solution (the 14″ flexplate is included for automatic applications).
Q2: Is this the same engine that came in the Corvette and Camaro?
A: Yes, this is the production LS3 engine used in the 2008+ C6 Corvette and 2010+ Camaro SS, delivering the same 525 horsepower rating. It is a genuine GM factory engine.
Q3: Can I use a carburetor on this LS3?
A: Yes, but it requires modification. You would need to remove the included EFI components and install a carburetor-style intake manifold, a distributor-less ignition controller, and a mechanical fuel pump or carburetor-rated electric pump. Using the included EFI system is recommended for optimal performance and driveability.
Q4: What is the benefit of the rectangular port heads?
A: The rectangular port design, derived from the higher-revving LS7, offers superior airflow compared to the cathedral port heads found on earlier LS1/LS6 engines. This results in more power, especially in the higher RPM range, and provides excellent headroom for future modifications.
Q5: Does this engine have VVT (Variable Valve Timing) or AFM (Active Fuel Management)?
A: No. This crate engine version of the LS3 does not include Variable Valve Timing or Active Fuel Management (cylinder deactivation). This is a significant benefit for swaps, as it eliminates the complexity and potential issues associated with these systems, making the wiring and tuning process much more straightforward.
Pros and Cons
| Pros | Cons |
|---|---|
| OEM Reliability & Quality: Brand-new, factory-built engine with full GM backing. | Higher Initial Cost: Premium price point compared to remanufactured or aftermarket new options. |
| Complete Package: Includes EFI intake, throttle body, coils, and exhaust manifolds. | Requires ECU & Harness: Does not include the essential engine management components (must purchase separately). |
| No VVT/AFM Complexity: Simplified wiring and tuning compared to newer factory engines. | Premium Fuel Required: 10.7:1 compression ratio demands 91+ octane fuel for optimal performance and to prevent detonation. |
| High-Flow Rectangular Port Heads: Excellent standard airflow and potential for future power upgrades. | Weight & Size: While lightweight for its power, it is larger and may require modification for some classic car engine bays. |
| High Resale Value: The “Chevrolet Performance” name carries significant value in the market. |
Conclusion & Ideal Use Case
The Chevrolet Performance LS3 crate engine is the gold standard for a modern V8 swap. It is the ideal choice for the builder who prioritizes OEM-level reliability, proven performance, and a seamless, high-quality foundation for their project.
This engine is perfectly suited for:
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Pro-Touring Restomods (1967-1981 Camaros, Chevelles, Novas)
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Classic Corvette and Hot Rod Modernizations
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Kit Cars (Factory Five, Superformance, etc.)
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High-Performance Street Machines where drivability and power are equally important.
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Any project demanding a turn-key, brand-new GM powertrain.
If your goal is to combine classic style with cutting-edge, worry-free horsepower, the Chevrolet Performance LS3 is the definitive and most respected choice.
