The official name of this car is the "STI Performance Concept," but let's call it what it is: a badass BRZ. Subaru dropped in the engine from its GT300 racer in Japan and the result is a sizable power increase from the stock 2.0-liter boxer engine. The STI Performance Concept is officially quoted as putting out 345-bhp and 332-lb ft of torque. But Dominick Infante, Subaru's national manager of product communications in the US, told Top Gear that the real number is 450 hp.

In addition to its beastly engine, this tuned BRZ is covered in STI-badged parts, including a gigantic wing, 18-inch alloys, racing seats and the requisite shifter knob. As you might have guessed, the STI Performance Concept is strictly a one-off. In fact, it's a one-off marketing tool designed to promote the arrival of Subaru Tecnica International, which will soon replace Subaru Performance Tuning (SPT), in the US. As such you'll soon be able to buy STI parts and accessories, and down the line more STI-branded models may be made available in the US too.