Sorry that I was not more clear. In the referenced picture above, I'm trying to determine the ctr to ctr distance between those two holes in the chassis - each of them having a rubber plug in them from the factory. The reason is that we make some Focus RS - specific parts, one of them being some solid-billet bolt-on Jack Rails. We had an ST-owner inquire to see if our Jack Rails would fit onto his ST - and frankly we do not know the answer. I suspect that they will work as the underside of both cars looks the same from these pictures. However, if someone could provide us with this dimension, then we would know for certain.I'm a bit confused on what the OP is asking.