What the difference between Citron saxo cylinder head Z04 and Z06?

The main difference between the Citroen Saxo cylinder head Z04 and Z06 lies in their specifications and compatibility with different engine variants. The Z04 is typically associated with the 1.1 and 1.4-liter engines, while the Z06 is designed for the more powerful 1.6-liter engine. This results in variations in performance characteristics and tuning potential, with the Z06 generally offering higher power output and efficiency. Additionally, the porting and combustion chamber designs may differ, affecting airflow and combustion efficiency.