ATK GM 383 Stroker 500 HP HP55C Stage 3 Complete Engine
ATK GM 383 Stroker 500 HP HP55C Stage 3 Complete Engine offers a precision-engineered Stage 3 assembly featuring elite aluminum heads and a ready-to-run carbureted completion for professional builds.
- Power Level: Proven 500 Horsepower performance.
- Actual Displacement: 6.3L / 383 CI Stroker.
- Cylinder Heads: Aluminum High-Flow heads.
- Block Material: Cast Iron Block material.
- Dress Level: Complete Stage 3 Carbureted.
One Year Limited Warranty Included.
Description
ATK HP55C 500 HP Complete Crate Motor
ATK GM 383 Stroker 500 HP HP55C Stage 3 Complete Engine units leverage a complete performance powertrain configuration to deliver immediate high-output results in vintage vehicle restorations. Featuring advanced aluminum cylinder heads and a seasoned cast-iron block, this 383ci stroker is a turnkey-ready fit for classic Chevrolet and GMC trucks and performance cars. The assembly produces 500 horsepower, utilizing a hydraulic roller camshaft to maintain a powerful torque curve and consistent mechanical reliability across all RPM ranges.
Integrating this turnkey performance powerplant is simplified by the inclusion of a pre-tuned carburetor, intake manifold, and HEI distributor. The ATK HP55C arrives with essential components like the water pump, harmonic balancer, and spark plugs, significantly reducing installation time for classic engine swaps. Protected by a 1-Year professional warranty, this Stage 3 configuration is the ideal choice for enthusiasts seeking a ready-to-run 383 stroker that combines elite horsepower with professional-grade assembly standards and a leak-free one-piece rear main seal.
Key Features of ATK High Performance HP55C
- 6.3L 383ci displacement with verified 500 horsepower output.
- Aluminum cylinder heads for improved cooling and airflow.
- Stage 3 complete build includes pre-installed induction system.
- Hydraulic roller camshaft ensures stable and quiet valvetrain operation.
- Precision-balanced internal/external assembly for smooth power delivery.
- One-piece rear main seal prevents chronic fluid weeping.
- Standard 1-Year professional limited warranty included.
HP55C Include:
- Intake Manifold
- Carburetor
- Distributor
- Oil Pan
- Valve Covers
- Timing Cover
- Water Pump
- Harmonic Balancer
- Flexplate
- Spark Plugs
- Spark Plug Wires
ATK High Performance GM 383 Stroker 500 HP Stage 3 Long Block Crate Engines HP55C Specs
| Brand | ATK High Performance Engines |
|---|---|
| Manufacturer's Part Number | HP55C |
| Part Type | Crate Engines |
| Product Line | ATK High Performance GM 383 Stroker 500 HP Stage 3 Long Block Crate Engines |
| Summit Racing Part Number | HPE-HP55C |
| UPC | 00653517259760 |
| Crate Engine Family | Chevy Small Block |
| Actual Engine Displacement | 6.3L/383 |
| Crate Engine Cylinder Head Material | Aluminum |
| Engine Block Material | Cast iron |
| Assembled | Yes |
| Engine Balance | Internal/External |
| Cam Style | Hydraulic roller, OE roller |
| Rear Main Seal Style | 1-piece |
| Intake Manifold Included | Yes |
| Intake Manifold Style | Carbureted |
| Cylinder Heads Included | Yes |
| Carburetor Included | Yes |
| Throttle Body Included | No |
| Distributor Included | Yes |
| Oil Pan Included | Yes |
| Valve Covers Included | Yes |
| Timing Cover Included | Yes |
| Water Pump Included | Yes |
| Harmonic Balancer Included | Yes |
| Flexplate Included | Yes |
| Flywheel Included | No |
| Air Cleaner Included | No |
| Spark Plugs Included | Yes |
| Spark Plug Wires Included | Yes |
| Computer Included | No |
| Wiring Harness Included | No |
| Supercharger Included | No |
| Quantity | Sold individually. |
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