I spotted the Woodward Ram Air 6 GTO concept at the Goodguys Get Together in Pleasanton, CA this passed weekend. Much more stunning in person than I imagined. It's got an LS2-based powerplant but I didn't study it close enough to see if it had any power adders. The ram air intakes shroud most of the engine compartment. Lots of carbon fiber detailing throughout the car. Very slick.