The "mm" is for what sway bar you have. That is why they ask for that.
I believe 2004 has the sway bars that mount to the strut and then to the sway bar itself. The 1997-2003 have the thicker sway bar that mounts to the LCA. Either LCA fit but the tab that is welded on the older LCA does get in the way if you have the strut mounted sway bars.
Later on in like 2006 they switched back the LCA mounted sway bar. Pretty sure just 2004-2005 had the strut mounted sway bars.
If you can measure your sway bar and just visually look at the bar you can determine what lower control arm you need.
