Spectre 3/8-Inch. x 8-Foot Blue Convoluted Tubing
Buy It Now: $5
This piece right here is mainly stupid due to the way people will use it. Kids with their Japanese tuners will see a cool picture of an awesome chromed out Skyline with blue paint and blue engine accents and think they can do that to their Integra (admittedly, this is partially from experience). They will go buy three pieces of chrome, some blue tubes, and that's it. When they realize how much money, time and effort it would take to completely makeover an engine bay, the car will be stuck with three random blue things. Subsequently, it will look really stupid, and your father who told you it was a silly idea in the first place will give you a nice, big "I told you so."