i spent a year there and traveled the roads quite a bit. most of the modified cars were either tiburons (tuscans) or elantras. and from what i saw, they were mostly just cosmetic mods. like the early US car scene, exhaust, springs, lights, wings, etc. there was a badass FD near base, but i never looked closely at it.
as for regular cars, virtually everything is a hyundai, kia, or daewoo, and in silver, black, or white. mostly small sedans and SUVs, few coupes and virtually no sports cars. so the general car population is pretty bland. now there are some very rich people in korea so they have their share of BMWs, mercedes, ferraris, and lambos, etc. it seems like there are as many v12 7 series as 3 and 5s. probably not, but compared to the states where there are huge numbers of 3s and a bunch of 5s for every 7, it's much closer.
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