Ever since the advent of the American muscle car, owners have craved two things in their ride: performance and customization. Whether it’s a 427ci big block or an eye-catching all-leather interior, car enthusiasts have always wanted the most powerful engine in a body that’s one of a kind. In today’s market, you have hundreds of options to build the car you want from your manufacturer or choice’s year model. However, some shoppers want to go above and beyond and find a car that’s truly out of the ordinary. Up next are some of the rarest muscle cars and classics that you won’t find on the streets on any given day. No more than 150 of any of these cars are still around; some of these models have only a handful accounted for in official production and manufacturing records. For a look at the rarest cars in existence, keep reading.