^a quick answer to that is, those people who installs those are the ones na unang beses lang nagka kotse. maglalagay ng boom boom pow sounds, hell a lot of stickers, and bodykits para daw astig sila at maiba. and most of these people are students din. haha
these are the people din that can't get over with the likes of NFS underground and the First two parts of Fast and the Furious.