20 all around should work. I ran 20 / 25 on the 2013 rims with no issues. The Z1 spacers should be fine quality wise. I'm probably going to be picking up some smaller ones from them to get rid of that last few mm of gap on my setup.
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Competition Clutch|Fast Intentions|Maxbore|NST|Setrab|Stillen|Tomei|Uprev| Z1
Avant Garde|SPC|Stance|Whiteline
Aerojacket|Seibon|Tanabe|TRS|TWM
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