You wouldn't know it by looking at it, but the wild Subaru STI Performance concept is actually one of the mildest concepts in this roundup. The concept shows that small tweaks to the BRZ's style and performance can make a very big impact.
It looks bonkers in that retina-searing green paint, but the most interesting detail about this Honda Civic concept is that it will reach the States with a new series of turbocharged engines beneath its hood.
Wearing a four-door coupe profile that's all the rage these days, the Volkswagen GTE concept distinguishes itself with conceptual integration with a smartwatch or fitness band to assess and adapt to the driver's mood.
We're cheating here because the 800-plus horsepower Aston Martin Vulcan is a production car, not a concept. However, it's simply too hot to ignore and Aston is only building 24 examples, none of which will be street legal. This is an ultra-exclusive, track-only toy.