poseur: a person who pretends to be what he or she is not : an affected or insincere person

Unless those people are intending to be folks who own cars that have stickers on them and no real performance upgrades, then they're poseurs. It seems to me that they want to appear to have a ``fast'' car.

But if they do intend to be sticker-car people, then that's just sad.
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Bitt Faulk