Connects the top of the water pump to the bottom of the cylinder head. This is the original style that lasts forever, but requires either the head or the water pump to be removed for installation.
This or C-GZA2083 is the only one to use when you are removing the head anyway. As a bonus made in Kevlar for longer life.
Slightly beefed up wall size to the standard small bore Mini GZA2083 type.