G-Craft Classic Style Aluminium Cylinder Head Cooler (7 Fin Version) suitable for use with Z50A, Z50J1, Z50R, Z50J, Dax 6V, Dax 12V7 cooler fin version Depth: 61mm (see photograph showing where measurement is taken from) A separate gasket is required for 6V engines (types where the cam is not supported by bearings). Please make sure the depth measurement has adequate clearance for your application. It is impossible to mount this cooler on a Honda Chaly as the frame does not have enough clearance. FI model vehicles cannot be installed.