Originally Posted by mac.mogul
00-04 Focus will require the SVT knuckles for installation.
You can also use '05 only spindles w/ '05+ ball joints. '05 spindles use the earlier smaller diameter struts & use the new for '05 bigger ball joints. The caliper mount spacing is svt size= hence you can bolt on svt rotors & calipers or any BBK.
It should be in the suspension/brake stickies.