Atk High Performance Gm 383 Stroker 415 Hp Stage 3 Long Block Crate Engines With Efi Hp94C-Efi
$4.200
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.
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.
Questions & Answers
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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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