The first muscle car hits speedy advance for 2011, with a few brand new motors, parcels more capacity, and the profit of the Boss 302 (as a 2012 ). The unique 3.7-liter V-6 produces 305 pull, the newfangled 5.0-liter V-8 412, the Boss form rates 440, and the 510-hp GT500 gets an aluminum piece and suspension tweaks.