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Atk High Performance Ford 408 Stroker 430 Hp Stage 3 Efi Long Block Crate Engines Hp21C-Efi
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$5,400.00
The ATK High Performance Ford 408 Stroker Stage 3 EFI Long Block (HP21C-EFI) delivers 430 horsepower of advanced performance with Electronic Fuel Injection (EFI) for Ford vehicles, muscle cars, and street builds.
Fully assembled and factory-tested, this long block ensures efficient fuel delivery, consistent power, and reliable operation for high-performance street or mild racing applications.
Condition: New
The Ford 408 Stroker Stage 3 EFI Long Block (Part #HP21C-EFI) is designed for enthusiasts seeking maximum performance with modern fuel injection technology.
This Stage 3 stroker includes precision-engineered components, forged rotating assembly, Stage 3 performance camshaft, EFI-ready intake, and upgraded internals, providing enhanced power, fuel efficiency, and durability.
Included Components:
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Engine block
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Cylinder heads
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Camshaft and valve train
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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 intake and fuel system compatibility
Performance Overview:
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408 C.I.D. (6.7L) Stroker V8 engine
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430 horsepower output
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Stage 3 performance build
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EFI-ready long block for modern fuel delivery
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Compatible with Ford vehicles, muscle cars, and street builds
Key Features
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ATK High Performance Ford 408 Stroker Stage 3 long block
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430 horsepower output
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Fully assembled, EFI-ready, and factory-tested
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Includes all critical engine components for installation
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Engineered for street, muscle car, and mild performance builds
Key Technical Specifications
| Specification | Details |
|---|---|
| Brand | ATK High Performance |
| Part Number | HP21C-EFI |
| Engine Type | V8, Ford 408 Stroker |
| Configuration | Stage 3 Long Block Crate Engine with EFI |
| Displacement | 408 C.I.D. / 6.7L |
| Horsepower | 430 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 intake |
| Recommended Use | Ford vehicles, street builds, muscle cars, mild racing, performance upgrades |
Compliance & Disclaimer
Horsepower and torque ratings should be verified with ATK High Performance specifications.
Professional installation and proper break-in procedures are recommended.
EFI components may require additional tuning.
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 Samuel Reed
by Julia Hartono