i'll tell you guys how the whole asian way of spoiling kids works. since i kidna went thru it, and still is going thru it.
school is the number one priority for asian parents. if you get bad grades, you can expect a whole term of grounding. i was grounded on new yrs eve in gr 11 b/c of my grades. and by bad they mean only 2 A's...so yes it gets that bad. you do well in school. you get rewarded and they no longer ground you on new yrs eve like this yr during First yr University. And by rewards, depending on each family's financial ability they usually get a car, laptop, computer, money. for me. i got insurance and part of the mazda6 paid for.
now scenario #2. one or both parents live on the other side of the world. to make up for "the lack of love" they buy their kid a nice spanking new m3 or something like this regardless of the child's or teen's behaviour. first of all, they don't know about their behaviour, and secondly thers no way of monitoring it. so basically, you hand a m3 to a kid who hasnt been disciplined for the past 3-4 yrs. he turns the m3 into something ugly, and street races it.
so to answer your question crolly. thats how asian kids get their cars and car parts. cuz yes i see a lot of young kids drivn expensive cars as well.
and some do things like this
http://www.wreckedexotics.com/carreragt/carreraGT_20050107_001.jpg and some do what you saw.
most azn parents will not give money to their kids to mod their cars. My bro lowered the accord and my parents when crazy on him. And they made him sell his intake too. I don't know..it just depends.
