The fuel rail has a 1/2 inch diameter bore...I got the silver one-lol....
The whole ordeal with the Kia dealership lasted a little less than a month. It was supposed to be this "optional" deal, but they were hasseling me and yelling at me, and my family and giving me attitude when I said no thanks. They weren't very nice about it. (the major problems occured over the week of my sister's wedding.) So yeah, not fun but at least its over and I got to keep my aveo!