[Gravter]

This is the info I found on Ford Racing site:

M-5560-ZX3B : $215.00
Improves handling
Fits 2006-2007 Focus except wagon
Lowers vehicle approximately 1.5"
Includes front and rear springs

And here are the dampers:
M-18000-ZX3B : $195.00
Similar to M-18000-ZX3
Improves handling
Fits 2006-2007 Focus except wagon
Includes front dampers with mounts, spring seats and rear dampers

Prices are U.S.
You can get these cheaper through some guy on FF.com.

I wonder how much better those dampers are compared to the ones on the ST.