4.500 Gen II Hemi Block Rough Bore

The 4.500 Gen II Hemi Block Rough Bore from Callies is a precision-engineered bare engine block designed for serious builds that demand maximum displacement and reliability. This block is ideal for high-performance applications in both street and competition environments, serving as the foundation for custom Hemi-platform powerplants where bore diameter and deck height are critical variables.

The rough bore casting provides the raw material needed to achieve exact specifications and tight tolerances. Callies' Gen II Hemi block features a 4.500-inch bore diameter and is designed to accommodate stroke combinations that demand larger displacement without sacrificing the legendary Hemi architecture. The four-bolt main bearing cap design delivers the structural rigidity required for high-boost turbocharged builds and naturally aspirated high-RPM applications.

Builders, machine shops, and performance enthusiasts rely on this rough bore block for custom stroker builds, race engine development, and high-horsepower street applications. The two-piece rear main seal configuration enables modern sealing technology and improved reliability over legacy one-piece designs, making it a preferred choice for those looking to push the limits of performance.