A part of that has to do with the fact that 100% of Vipers are hand-built. So you pay out the nose for everything involved. They're happy to give you whatever paint you want since you're paying such a huge amount of money for the attention to detail involved with a hand-built car.

Challengers roll down a production line, you get what paint they decide. I'm sure if everyone wanted to jack the base price of the Challenger by $10k+ they'd be happy to give us a full array of colors all year 'round.