Svoemesto Kayfun V4 4S-Kit
Svoemesto Kayfun 4 4S-Kit
The 4s Kit for the Kayfun V4 includes a different airflow centerpost, that increases the airflow to 2.7mm. Due to the wide bore airflow control with the 4s kit is technically impossible.
Further the kits includs a PEEK insulator that is a higher temperature resistance than the regular POM-C insulator.