my take on the subject is this:

-jdm/edm/rdm whatever. these parts are factory from one region or another. sure they are for "looks" but they don't claim to be "racers". the money is spent on a different functional look.

-ricers i.e. wings,"alteezas",big tachs,pointless gauges,neons, generally serve no purpose other then grabbing attention. they are generally very poorly constructed AND are assembled by those with the mentality of a fucking 6th grade student.

but this subject has been covered quite a few times