Hose, upper, for cooling radiator connection for Porsche 928 S4 GT GTS

This water hose is the (upper) connection from regulator housing to radiator on all 928 with 5.0 and 5.4L 4-valve engines.

Over the years, as you know, all rubber parts become porous and can cause serious secondary problems with hose lines on the vehicle. That is why it is recommended to replace water and air hoses after the years as a precaution.