15mm f&r and it's perfect. Make sure you are getting the stud replacement spacers otherwise they will not work on the front. A good brand is H&R DR-S, that's what other people are running.

yup, i have the H&R DRS (10mm and 15mm) and the lug nuts, so im just waiting to install. im considering putting the 15s up front since it looks like they have more clearance, but it might be a trial and error process since i already purchased the mismatched set =/