Buy GM 400 C.I.D. 508 HP Dressed Long Block Crate Engines Online
Dominate the water or the street with the ultimate power upgrade. This GM 400 C.I.D. 508 HP Dressed Long Block Crate Engine delivers massive torque and 500+ horsepower in a turnkey package designed for high-performance reliability. Order today from Electrical Marine Solutions and feel the difference of a precision-built stroker.
When it comes to raw American muscle, the GM 400 engine remains a legendary choice for enthusiasts seeking displacement and durability. GM 400 C.I.D. 508 HP Dressed Long Block Crate Engines Our GM 400 C.I.D. 508 HP Dressed Long Block Crate Engines take that heritage to the next level. GM 400 C.I.D. 508 HP Dressed Long Block Crate Engines This isn’t just a rebuild; it’s a high-performance masterpiece engineered to solve the “lack of power” problem once and for all.
Whether you are upgrading a classic cruiser or looking for a reliable marine powerhouse, this GM 400 crate engine offers the perfect balance of massive low-end torque and high-RPM horsepower. While many modern builders focus on smaller platforms like the LS3 6.2 crate engine or the 6.2 LS engine, the classic 400 small block provides a unique displacement advantage that translates to immediate throttle response.
Every engine is dyno-tested to ensure it hits the 508 HP mark, giving you peace of mind that your investment is backed by proven data. Fully dressed and ready to drop in, this engine eliminates the headache of sourcing individual components, saving you weeks of shop time.
Overview
- Brand: BluePrint Engines
- Manufacturer’s Part Number: BP4002CTC1
- Part Type: Crate Engines
- Product Line: BluePrint Engines GM 400 C.I.D. 508 HP Dressed Long Block Crate Engines
- Summit Racing Part Number: MLL-BP4002CTC1
- UPC: 816671020755
- Crate Engine Family: Chevy Small Block
- Actual Engine Displacement: 6.6L/400
- 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: No
- Harmonic Balancer Included: No
- Flexplate Included: No
- Flywheel Included: No
- Air Cleaner Included: No
- Spark Plugs Included: No
- Spark Plug Wires Included: No
- Computer Included: No
- Wiring Harness Included: No
- Supercharger Included: No
- Remanufactured: No
- Quantity: Sold individually.
BluePrint Engines GM 400 C.I.D. 508 HP Dressed Long Block Crate Engines
Dressed for high performance, BluePrint Engines GM 400 c.i.d. 508 hp long block crate engines are not your grandpa’s 400! Built by skilled craftsmen, these blocks are assembled with ignition and carburetor, as well as valve covers, oil pan, and timing cover. The most complete crate engine available, they offer you fast, easy installation. And because they’re dyno-tested, you can be sure all the components will work together perfectly!
BluePrint’s GM 400 c.i.d. 508 hp dressed engines feature:
- Cast iron block with 4-bolt mains
- Compression ratio: 10.3:1
- Forged crankshaft
- 5.7 in. connecting rods
- 150,000 psi rod bolts
- Forged pistons
- Hydraulic roller cam
- BluePrint aluminum heads with 64cc chamber
- Intake manifold dual plane, satin aluminum
- Carburetor
- Dyno test results shipped with the engine
- 30-month/50,000-mile warranty
Benefits / Why Choose This Product
The GM 400 C.I.D. 508 HP Dressed Long Block Crate Engines offer a significant displacement jump over a standard 6.0 LS engine or a basic 6.2 engine. Because it is a “Dressed” long block, you aren’t just buying parts; you’re buying time and precision. While a 6.2 LS3 crate engine is excellent for modern swaps, the 400 Small Block provides a classic fitment and massive displacement that is easier to integrate into traditional engine bays and marine setups.
FAQs Section
Does this engine come with a warranty?
A: Yes, all our crate engines come with a limited manufacturer’s warranty to ensure your investment is protected.
Is this engine suitable for marine use?
Absolutely. With its high torque output, it is an excellent choice for performance marine applications.
What fuel octane is required?
This engine is designed to run efficiently on 91 octane premium pump gas.
How soon can it ship?
We maintain a rotating stock, but due to high demand, please contact us for the most current lead times.

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