Hawks Motorsports offers our clients this BPP12110349 GM Small Block Compatible Bare Block 9.025 Deck x 4.125 Bore, 1-Piece Seal, 350 Main, SIAM Cast Main Caps, BluePrint Engines for custom small block Chevrolet engine builds requiring a durable and versatile foundation. This bare engine block is designed around GM Small Block architecture and provides engine builders with a platform for performance street, restoration, and custom engine applications.

The BPP12110349 features a 9.025-inch deck height, 4.125-inch cylinder bore, 350 main bearing configuration, 1-piece rear main seal design, SIAM (Siamese) cylinder wall construction, and cast main caps. This configuration provides a strong starting point for custom small block Chevrolet assemblies where increased bore capability and SIAM cylinder support are required.

The SIAM cylinder wall design provides additional support between cylinder bores, making this block suitable for larger bore applications requiring additional cylinder wall strength. The cast main cap configuration provides a durable foundation for properly matched rotating assemblies and professionally prepared engine builds.

This BPP12110349 bare block is supplied as a foundation component only and requires professional machining, inspection, cleaning, measuring, and final assembly preparation. Engine builders should verify compatibility of all internal and external components, including crankshaft, pistons, rods, cylinder heads, oiling system, accessory components, and transmission requirements before assembly.

Key Features:

• Part number BPP12110349
• BluePrint Engines GM Small Block compatible bare block
• 9.025-inch deck height
• 4.125-inch cylinder bore
• 350 main bearing configuration
• 1-piece rear main seal design
• SIAM (Siamese) cylinder wall construction
• Cast main caps
• Cast iron engine block construction
• Designed for custom small block Chevrolet engine builds
• Large bore configuration for increased displacement potential
• Provides additional cylinder wall support through SIAM construction
• Suitable for performance street and custom engine applications
• 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
• Performance street engine applications
• Restoration engine builds requiring aftermarket small block architecture
• Custom high-performance 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.