Katech Engineering LLC - HEMI Cylinder Heads, Parts & CNC Porting Services

HEMI Cylinder Heads, Components & CNC Machining Services

HEMI cylinder heads, components, and CNC machining services are critical to controlling airflow into and out of the combustion chamber, directly influencing volumetric efficiency, combustion stability, and overall engine performance.

HEMI-based cylinder head designs utilize a combustion chamber and valve arrangement that supports efficient airflow and combustion characteristics at elevated engine speeds. Proper development of port geometry, valve sizing, chamber design, and surface finish is required to maintain consistent airflow and combustion behavior across the operating range.

Katech HEMI cylinder head solutions are developed through in-house engineering and professional motorsports programs. Since 1977, this experience has informed airflow development, machining processes, and component selection across high-performance and racing engine applications.

Complete cylinder heads, individual components, and CNC machining services are available to match application-specific requirements. Components such as valves, valve springs, retainers, guides, seals, fasteners, and related hardware are selected based on compatibility with the intended engine configuration, valvetrain requirements, and operating conditions.

CNC porting and machining processes refine intake and exhaust port geometry while maintaining structural integrity and proper cylinder head architecture. Services such as resurfacing, guide work, valve jobs, and complete rebuilds are performed to restore sealing integrity, maintain proper surface finish, and support long-term durability under elevated cylinder pressure and engine speed.

All HEMI cylinder head components and services are machined, assembled, and validated in-house at Katech’s Clinton Township, Michigan facility. These processes align with those used in professional racing programs and support airflow performance, valvetrain stability, and durability under demanding operating conditions.