From what I have gathered from 2012ZL1 here are codes he's helped us identify
RSK = black rims (std)
RTQ = Polished rims
B92 = Exposed CF Hood (doesnt show up on quick order - wait to adjust in Trad. system)
DSW = Decal Pkg with CF appearance
DSX = Decal Pkg Matte finish to go with stock hood
Thats all I have so far.