Hennessey Performance HPE650 package for the 2011 Ford Mustang Boss 302 hits the dyno, putting down 563 rwhp, and 475 lb-ft rear wheel torque. That’s an increase of nearly 120 hp and 100 lb-ft over the standard car. And it’s mostly due to the sophisticated supercharger Hennessey has designed. It also sounds very cool. Watch the video after the jump.