Some become legends, while others...well, they're better left as sketches. Buckle up, because we're about to take a joyride through eight concept cars that never made it to your local dealership ...

Sometimes, a concept car is kind of a rough sketch for an eventual production model. And sometimes a concept car guides an entire industry into the future, as was the case with the Buick Y-Job ...

Today, though we have what are apparently the first sketches of two new concept cars from PRO-AMX also known as Proyectos Automotrices Mexicanos or Mexican Automotive Projects. Pictured above is ...