My brother was running Krimson K6 wheels (18x8 ET +40). You would need an 18in rim with a offset in the mid 40s.
Example: An 18x8 w/48 offset (standard LGT rim upgrade) you will need a 3-5 mil spacer. These do take up some room but are worth it.
Thanks for your interest.
'07 Forester STI (ECS Performance)..SOLD!
'09 Spec B...Sold!
'10 LGT Limited (Protuned by Chris at EFI Logics)
'11 LGT Limited