20mm no drop will look silly. they will stick out past the fenders. the lower you drop the more camber you will get. this helps those who run 20mm in the back to make them tuck in when they hit bumps. >>>it also looks sick!<<< buuut if you want to run a close to factory camber setting im almost positive it will rub. perfect would be a 17-18mm spacer.
sadly up front we need closer to a 18mm spacer. 15mm looks great and only rubbing is during extreme cornering while hitting a dip/bump, but i think it could use a few more millimeters. 20 rubs and thats not guna fly on my car. im past all those slammed rubbing camber games.
thats with factory tires. add in beefy rubber and things get tighter
and for those you who think 1-5mm isnt sh1t and you cant tell..... some of us care
http://www.the370z.com/members/fuct-...ront-rear.html