ATK GM 489 Stroker 565 HP HP411PC Stage 3 Complete LB
ATK GM 489 Stroker 565 HP HP411PC Stage 3 Complete LB delivers precision-engineered Stage 3 power featuring elite aluminum heads and a ready-to-run carbureted completion for high-power street applications.
- Output Level: High-Performance 565 HP.
- Displacement Data: 8.0L / 489 CI.
- Head Material: Aluminum Cylinder Head.
- Main Block: Cast Iron Block.
- Dress Level: Complete Stage 3.
Official ATK High-Performance Warranty Included.
Description
ATK HP411PC 565 HP Stroker Big Block
ATK GM 489 Stroker 565 HP HP411PC Stage 3 Complete LB engines deliver an elite high-output big block crate motor solution for enthusiasts seeking massive 8.0L displacement. This 489ci stroker utilizes high-flow aluminum cylinder heads and a 10.0:1 compression ratio to produce a verified 565 horsepower. Engineered with a precision-ground hydraulic roller camshaft and an internal balance configuration, this powertrain is a perfect fit for elite muscle car restorations like the 1970 Chevelle or heavy-duty GM trucks demanding extreme horsepower and torque.
Integrating this turnkey performance powerplant is simplified by the inclusion of a pre-tuned carburetor, high-performance intake manifold, and HEI distributor. The ATK HP411PC package arrives with a water pump, flexplate, and spark plugs, all backed by a professional 1-Year limited warranty for long-term structural reliability. Protected against fluid weeping by a modern one-piece rear main seal, this Stage 3 assembly ensures elite-level performance and professional assembly standards for your next high-displacement big block project.
Key Features of ATK High Performance HP411PC
- 8.0L 489ci stroker displacement delivering 565 horsepower output.
- Aluminum cylinder heads optimized for maximum volumetric efficiency.
- Stage 3 complete build includes pre-installed carbureted induction.
- Hydraulic roller camshaft ensures stable and quiet valvetrain operation.
- Internal engine balance ensures smooth high-RPM power delivery.
- One-piece rear main seal prevents common big block oil leaks.
- Standard 1-Year professional limited warranty included.
HP411PC Include:
- Intake Manifold
- Carburetor
- Distributor
- Oil Pan
- Valve Covers
- Timing Cover
- Water Pump
- Harmonic Balancer
- Flexplate
- Spark Plugs
- Spark Plug Wires
ATK High Performance HP411PC GM 489 Stroker 565 HP Stage 3 LB Specs
| Brand | ATK High Performance Engines |
| Engine Model | HP411PC |
| Part Type | Crate Engines |
| Product Line | ATK High Performance GM 489 Stroker 565 HP Stage 3 Long Block Crate Engines |
| UPC | 653517517853 |
| Crate Engine Family | Chevy Big Block |
| Engine Displacement | 8.0L / 489 |
| Compression Ratio | 10.0:1 |
| Cylinder Head Material | Aluminum |
| Engine Block Material | Cast Iron |
| Assembled | Yes |
| Engine Balance | Internal |
| 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 |
| Warranty Info | 1 Year |
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