Just because I went through all of the calculations and I don’t want to lose this, here are the theoretical top speeds for the ’04 SVT Focus (with the stock 6 speed with dual final drives and 215/45-17 tires).

Gear Top Speed (MPH)
1st 41.25
2nd 68.60
3rd 94.54
4th 114.93
5th 137.72
6th 169.60