- May 8, 2012
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Hey guys, I'm just wondering what the diameter of the upper radiator hose is. The previous owner of my mustang did a crap job installing an aftermarket PCM and screwed all the wires up. So im going to take the PMC out of the cooling fan equation and install an independent 2 speed fan controller and the reader is going to go in the upper hose but i dont know the diameter of it.