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Blueprint Engines Marine Gm 355 C.I.D. 365 Hp Base Long Block Crate Engines With Cast Components Mbp3550Ct
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$3.000
The Blueprint Engines MBP3550CT is a GM 355 cubic inch marine base long block crate engine producing approximately 365 horsepower and 380 lb-ft of torque.
Built with marine-grade cast components, this engine is ideal for boats, performance watercraft, and marine enthusiasts seeking reliable and consistent power.
The Blueprint Engines Marine GM 355 C.I.D. 365 HP Base Long Block (MBP3550CT) delivers dependable marine performance using the proven GM small block platform.
This base long block includes short block, cylinder heads, valve train, and cast components, allowing installation of your intake, fuel system, and ignition.
Blueprint Engines assembles, balances, and dyno-tests each engine in the USA to ensure consistent power output and marine durability.
Performance Overview:
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Factory dyno-tested output: approximately 365 HP and 380 lb-ft torque
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355 cubic inch (5.8 L) GM small block platform
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Base long block design allows for custom marine installation
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Hydraulic camshaft for smooth torque delivery
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Built for marine performance, durability, and reliability
Key Features
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GM 355 C.I.D. small block V8 configuration
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Base long block with pre-installed marine-grade cast components
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Hydraulic camshaft for smooth, reliable operation
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Balanced and blueprinted rotating assembly
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Aluminum cylinder heads for improved airflow
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Factory dyno-tested for verified horsepower and torque
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Ideal for boats, high-performance watercraft, and marine applications
Key Technical Specifications
| Specification | Details |
|---|---|
| Brand | Blueprint Engines |
| Part Number | MBP3550CT |
| Series | Marine GM 355 |
| Engine Type | Chevrolet Small Block V8 Marine |
| Configuration | Base Long Block |
| Displacement | 355 Cubic Inches (5.8 Liters) |
| Horsepower (Factory Tested) | Approx. 365 HP |
| Torque (Factory Tested) | Approx. 380 lb-ft |
| Block Material | Cast Iron |
| Cylinder Heads | Aluminum |
| Crankshaft | Forged Steel |
| Connecting Rods | Forged Steel |
| Pistons | Forged Aluminum |
| Camshaft Type | Hydraulic Roller |
| Compression Ratio | ~9.6:1 |
| Fuel System | Carbureted or EFI (not included) |
| Fuel Type | Gasoline |
| Ignition System | Not Included |
| Cooling System | Water-Cooled (Marine Compatible) |
| Condition | Brand New |
| Country of Origin | United States |
| Included Components | Cylinder heads, valve train, short block, cast components |
| Recommended Use | Marine applications, performance boats, watercraft |
Compliance & Disclaimer
All horsepower and torque figures are approximate manufacturer dynamometer results.
Actual output may vary depending on intake, exhaust, and tuning setup.
This engine is designed for marine and performance use and is not certified for emissions-controlled vehicles.
Professional installation and proper break-in procedures are strongly recommended.
Questions & Answers
Have a question about this product? Ask below — we’ll reply as soon as possible.
Return & Refund Policy
- Return Period: Within 30 days of delivery.
- Condition: Unused, original packaging, all accessories included.
- Non-Returnable: Gift cards, personal care, custom or digital items, sale items.
- How to Return: Email support@fastoutboard.com for RMA and return address.
- Shipping: Customer pays unless item is faulty or incorrect.
- Refund: Processed within 5–10 business days after inspection.
Warranty
- Coverage: 1-Year limited warranty for manufacturing defects.
- Excludes: Misuse, wear, or unauthorized repair.
- Claim: Email proof and photos to support@fastoutboard.com.
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