4.315 Gen II Wedge Block Rough Bore

The CALLIES 4.315 Gen II Wedge Block Rough Bore is designed for high-performance engine building, catering to serious enthusiasts and professional builders who require reliability in extreme applications. This bare engine block is ideal for custom engine development, race applications, and restorations that involve precision boring and deck work.

Constructed from premium ductile iron, the rough bore configuration allows builders to specify final bore sizing and honing to match their exact piston and ring specifications. The Gen II wedge architecture enhances strength and durability, making it suitable for substantial displacement increases while maintaining proper wall thickness for turbocharged or supercharged applications.

Engine builders and machine shops often choose CALLIES rough bore blocks for street performance, bracket racing, and competition engines where durability and repeatability are crucial. The unfinished cylinders provide the flexibility to achieve the exact bore size, honing pattern, and surface finish required for various piston packages, whether stock stroke, stroker, or hybrid configurations.