Atk High Performance Gm 383 Stroker 415 Hp Stage 3 Long Block Crate Engines With Efi Hp94C-Efi
$4,200.00
The ATK High Performance GM 383 Stroker Stage 3 Long Block with EFI (HP94C-EFI) delivers 415 horsepower of reliable, high-performance power for GM vehicles and classic muscle cars.
Fully assembled and EFI-ready, this long block ensures turnkey installation, consistent performance, and optimal drivability, making it perfect for street, performance, or restoration applications.
Condition: New
The GM 383 Stroker Stage 3 Long Block (Part #HP94C-EFI) is designed for enthusiasts seeking maximum performance with modern fuel injection compatibility.
Stage 3 builds feature forged internals, high-performance camshaft, precision-balanced rotating assembly, and EFI-ready setup, offering strong power delivery, efficiency, and durability.
Included Components:
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Engine block
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Cylinder heads
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Stage 3 performance camshaft
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Rotating assembly (crankshaft, rods, pistons)
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Oil pan
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Timing components
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Valve covers
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EFI-ready components for fuel injection installation
Performance Overview:
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383 C.I.D. (6.3L) Stroker V8 engine
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415 horsepower output
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Stage 3 performance build
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EFI-ready for modern fuel-injected setups
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Compatible with GM muscle cars, street builds, and performance vehicles
Key Features
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ATK High Performance GM 383 Stroker Stage 3 long block
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415 horsepower output
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Fully assembled, factory-tested, EFI-ready
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Includes all critical engine components for installation
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Engineered for street, muscle car, and performance builds
Key Technical Specifications
| Specification | Details |
|---|---|
| Brand | ATK High Performance |
| Part Number | HP94C-EFI |
| Engine Type | V8, GM 383 Stroker |
| Configuration | Stage 3 Long Block Crate Engine with EFI |
| Displacement | 383 C.I.D. / 6.3L |
| Horsepower | 415 Hp |
| Torque | Check Manufacturer Specs |
| Block Material | Cast Iron |
| Cylinder Heads | Aluminum |
| Crankshaft | Forged Steel |
| Connecting Rods | Forged Steel |
| Pistons | Forged Aluminum |
| Camshaft Type | Stage 3 Performance Cam |
| Fuel System | EFI-Ready (Fuel Injection Compatible) |
| Fuel Type | Gasoline |
| Ignition System | Not Included |
| Cooling System | Water-Cooled |
| Condition | Brand New / Factory-Tested |
| Country of Origin | United States |
| Included Components | Block, heads, camshaft, rotating assembly, valve train, oil pan, timing components, valve covers, EFI-ready components |
| Recommended Use | GM vehicles, muscle cars, street builds, performance upgrades, restoration projects |
Compliance & Disclaimer
Horsepower and torque ratings should be verified with ATK High Performance specifications.
Professional installation and proper break-in procedures are recommended.
EFI setup may require compatible fuel injection components.
Not certified for emissions-controlled vehicles in all regions.
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Return Policy
FourToolz accepts returns within 30 days of delivery for items that are unused, in their original packaging, and include all accessories.
Customers are responsible for return shipping costs unless the product is defective or incorrectly shipped.
For detailed information, please review our full Return Policy or contact us at sales@fourtoolz.com.
by Nabila Hasanah
by Isabella Brown