This isn't really an exclusive since each one of these cars come from a 5-pack. For example, the Spine Buster seen in this 4-pack originally came from the Track Builder 5-Pack. But the packaging and the assortment of cars is still an exclusive in itself, so that's neat! What else is neat is that I got this on sale, so it only cost me a bit more than 2 bucks, what a bargain!
HW Prototype 12