if u bought ur car new, it doesn't have an LSD. all focuses came w/ open diffs. (i can't say for the new 2012's, but if you have a pre-'12, then unless someone put it in for you as in the previous owner, it didn't come w/ one.
rockin 70+ hours a week at work and still trying to have a social life!!!
2004 SVT EAP partout, PM me with needs.