Chevy 348/409 Performer RPM Cylinder Head - Assm

The Chevy 348/409 Performer RPM Cylinder Head - Assm is an essential upgrade for operators and technicians maintaining legacy GM W-Series powerplants in high-performance or heavy-duty utility environments. This assembled aluminum head replaces heavy factory cast-iron components, significantly reducing front-end weight and improving the vehicle's overall center of gravity. It is engineered for those who demand reliable power and enhanced thermal efficiency from their specialized fleet vehicles or restoration projects.

Constructed from premium aluminum, this unit features a 220 cc intake runner and a 16 cc combustion chamber optimized for superior airflow and consistent combustion. The assembly comes equipped with large 2.190-inch intake and 1.720-inch exhaust valves, supported by 1.550-inch diameter valve springs capable of managing high-lift performance profiles. The straight spark plug configuration ensures maximum compatibility with a wide range of exhaust manifolds and headers commonly found in tactical support vehicles.

This cylinder head is purpose-built for the GM W-Series 348 and 409 cubic inch engines, providing a modern solution for aging hardware that requires increased torque and horsepower. Integrating the Chevy 348/409 Performer RPM Cylinder Head - Assm into your engine build allows for improved cooling characteristics and modern port geometry while maintaining the structural integrity of the original block. Professionals seeking a bolt-on performance solution will find this component critical for mission-ready engine reliability.