I'm using the 92-93 gsr upper radiator hose and its to big for the radiator. I saw some of the sites that had the reducer's. But the inner measurement of the radiator is 3/4 and the hose is 1 inch and there isn't one that fits that. Thanks

 

some guys use a short longth of smaller hose on the rdiator neck then run the bigger hose right over it and clamp it tightly over the smaller hose, right over the neck.