They are 4x108. They should, depending on what suspension you have and size tires you install you might have to roll your fenders. You do realize though it will be hard to find the last wheel as you can no longer buy them from Tire Rack and they were the only distributor of these wheels thus the only way to buy one is used and who knows when one will turn up but its up to you. I just dont want to sell these to someone thinking its going to be easy to find the 4th wheel, chances are it might take awhile to find one.
Build Thread: http://www.focusfanatics.com/forum/showthread.php?t=321737
Build Thread: Already Built... For Now