Aiming to kick up its game in energy-efficient subcompacts, the Gazoo Racing x Toyota iQ Supercharger Concept Car is the latest result to come out of  Toyota’s R&D partnership with Nürburgring, Germany’s Gazoo Racing Masters, on the way to developing a new, small-displacement turbocharged engine. Pictured above is the Japanese prototype, sans colors. Below, the limited production version, slated for 100 units, available this summer. View some hot test track footage here.