This is my first post and this may be a stupid question but here goes nothing. Me and a friend of mine are doing a y7/z6 mini me and I was just wondering if anyone knew the name of the part that connects the radiator hose to the head. When I bought the head, It didn't have this part and I have no idea what it is called.

 

coolant inlet

 

head coolant housing inlet

 

#5 COVER, THERMOSTAT

#6 COVER, WATER OUTLET

 

Thanks for the help