ATK GM 350 390 HP HP89C-EFI Stage 3 Multi-Port EFI Engine
ATK High Performance HP89C-EFI GM 350 390 HP Stage 3 EFI Specs
| Brand | ATK High Performance Engines |
| Engine Family | Chevy Small Block |
| Displacement | 5.7L / 350 CI |
| Compression Ratio | 10.0:1 |
| Intake Style | Fuel Injection |
| Throttle Body | Included |
| Computer/Harness | Included |
| Water Pump Style | Long |
| Cylinder Head | Aluminum |
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