Definition
Head design controls airflow, compression ratio, and cooling around the combustion chamber.
Porting, valve sizing, and multi-valve layouts are common performance upgrades.
Engine
The top section of the engine housing valves, ports, and often the combustion chamber.
Head design controls airflow, compression ratio, and cooling around the combustion chamber.
Porting, valve sizing, and multi-valve layouts are common performance upgrades.
Category: Engine · Updated August 31, 2026