I'm too lazy to remove the radiator hose to know what the inside diameter is. So if any one know let me know. Thanks

 

upper radiator hose? i believe it's 34mm, but i used a 36mm adapter for a gauge adapter to make it a snug fit.

 

Thanks alz0rz thats what i wanted to know. I'm seeing another custom install in the works.

 

alzorz thanks for the info your right on the 36mm it fits snugg but I'm having troubble in finding a Oil Filter Adaptor Plate for my car. I got the prosport one but there is a bolt that sticks out a little below the oil fliter that dosn't let me put the adaptor on and the bolt looks too importent to cut out. The greddy looks the same as the prosport and racing beat is out of the question the said it's not going to fit and not planning to make one. Any advise is very appreciated.