Hawks Motorsports offers our clients this BPP12110345 GM Small Block Compatible Bare Block 9.025 Deck x 4.125 Bore, 2-Piece Seal, 400 Main, SIAM, Ductile Cast Main Caps, BluePrint Engines for custom high-performance small block Chevrolet engine builds requiring a strong and durable foundation. This bare engine block is designed around GM Small Block architecture and provides engine builders with a versatile platform for large-displacement street performance, restoration, and racing applications.

The BPP12110345 features a 9.025-inch deck height, 4.125-inch cylinder bore, 400 main bearing configuration, 2-piece rear main seal design, SIAM (Siamese) cylinder wall construction, and ductile cast main caps. This configuration is designed for large displacement small block combinations where additional bore capability and increased strength are required.

The SIAM cylinder wall design provides additional support around the cylinder bores, making this block well suited for performance-oriented engine assemblies when properly machined and assembled. The ductile cast main caps provide a strong foundation for custom rotating assemblies, allowing engine builders to select crankshafts, pistons, rods, and valvetrain components based on their desired application.

This BPP12110345 bare block is supplied as a foundation component only and requires professional machining, inspection, cleaning, measuring, and final assembly preparation. Always verify compatibility of all internal and external engine components before beginning engine assembly.

Key Features:

• Part number BPP12110345
• BluePrint Engines GM Small Block compatible bare block
• 9.025-inch deck height
• 4.125-inch cylinder bore
• 400 main bearing configuration
• 2-piece rear main seal design
• SIAM (Siamese) cylinder wall construction
• Ductile cast main caps
• Cast iron engine block construction
• Priority main oiling system
• Designed for custom small block Chevrolet engine builds
• Suitable for large displacement performance combinations
• Supports engine combinations up to 454 cubic inches when properly machined and assembled
• Bare block configuration for custom engine assembly
• Requires professional machining and final preparation before use

Fitment Applications:

GM Small Block Chevrolet Compatible Applications:

• Chevrolet Small Block V8 custom engine builds
• Street performance engine applications
• Restoration engine builds
• High-performance and racing engine applications

Common Engine Configurations:

• Small Block Chevrolet stroker combinations
• Large displacement small block Chevrolet builds
• Custom SBC combinations requiring a 4.125-inch bore configuration
• Engine combinations up to 454 cubic inches when properly machined and assembled

Fitment Note:
Verify engine component compatibility before ordering, including crankshaft stroke, piston compression height, connecting rod length, cylinder head compatibility, intake manifold compatibility, oil pan configuration, accessory mounting requirements, and vehicle-specific installation details.

Installation Notes:

• This listing is for a bare engine block only.
• No rotating assembly, pistons, crankshaft, rods, camshaft, cylinder heads, bearings, timing components, or accessories are included unless specifically stated.
• Block requires professional inspection, machining, cleaning, and final preparation before assembly.
• Verify bore size, piston-to-wall clearance, deck height, bearing clearances, and rotating assembly compatibility before final assembly.
• Confirm compatibility of all internal and external engine components before ordering.
• Professional machining procedures are required for bore sizing, honing, deck preparation, align honing, and final engine preparation.
• Verify oiling system, timing components, accessory brackets, transmission compatibility, and vehicle application requirements before installation.
• Professional engine-building experience or qualified machine shop assistance is recommended.