ATK GM 350 Vortec 350 HP HP32M Stage 2 Long Block
ATK GM 350 Vortec 350 HP HP32M Stage 2 Long Block provides track-validated Vortec performance featuring rugged cast iron heads and a professional mid-dress assembly for street reliability.
- Power Rating: Aggressive 350 Horsepower.
- Engine Volume: 5.7L / 350 CI.
- Head Material: Cast Iron Cylinder Heads.
- Block Material: Cast Iron Block.
- Dress Level: Stage 2 Mid-Dress.
One Year Limited Warranty Included.
Description
ATK HP32M 350 HP Mid-Dress Crate Motor
ATK GM 350 Vortec 350 HP HP32M Stage 2 Long Block engines provide a versatile mid-dressed performance powertrain solution that streamlines the engine swap process. This 5.7L 350ci build features cast-iron Vortec cylinder heads and a seasoned cast-iron block, delivering a reliable 350 horsepower for muscle car and truck restorations. Despite the “Aluminum” mention in the series title, technical specifications confirm a robust cast-iron head configuration engineered for high-velocity airflow and a consistent 9.5:1 compression ratio.
Designed to reduce installation downtime, this mid-dress performance foundation arrives with a pre-installed carbureted intake manifold, HEI distributor, and long-style water pump. While the ATK HP32M includes essential timing and cooling components, builders must provide their own carburetor, spark plugs, and ignition wires to complete the build. The modern one-piece rear main seal ensures a dry engine bay by preventing fluid weeping, making this Stage 2 assembly an ideal choice for high-performance street applications and vintage Chevy restomods.
Key Features of ATK High Performance HP32M
- 5.7L 350ci displacement with verified 350 horsepower output.
- Cast iron Vortec cylinder heads for optimized power delivery.
- Hydraulic roller camshaft ensures consistent valvetrain stability.
- 9.5:1 compression ratio optimized for premium pump gas.
- Seasoned block casting provides long-term structural integrity.
- One-piece rear main seal prevents chronic fluid leaks.
- Mid-dress Stage 2 configuration simplifies final part matching.
HP32M Include:
- Intake Manifold
- Distributor
- Oil Pan
- Valve Covers
- Timing Cover
- Water Pump
- Harmonic Balancer
- Flexplate
ATK High Performance HP32M GM 350 Vortec 350 HP Stage 2 Long Block Specs
| Brand | ATK High Performance Engines |
| Part Type | Crate Engines |
| Product Line | ATK High Performance GM 350 Vortec 350 HP Stage 2 Long Block Crate Engines |
| UPC | 00653517259982 |
| Crate Engine Family | Chevy Small Block |
| Actual Engine Displacement | 5.7L / 350 CI |
| Crate Engine Cylinder Head Material | Cast iron |
| Engine Block Material | Cast iron |
| Advertised Compression Ratio | 9.5:1 |
| 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 | No |
| 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 | No |
| Spark Plug Wires Included | No |
| Computer Included | No |
| Wiring Harness Included | No |
| Water Pump Style | Long |
| Supercharger Included | No |
| Warranty Info | 1 Year |
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