The Boss 302 package is no longer available for the 2014 model year, but 2012-2013 Mustang Boss owners can head over to Brenspeed for a very neat upgrade that provides more than 250 of extra horsepower. The specialist's new 715R Supercharger Package, which can be acquired for $7,402.13, will boost any 2012-2013 Ford Mustang Boss 302 to... yep, you guessed it, 715 HP (and 590+ lb-ft of torque) at the flywheel. To get the 5.0-liter V8 ... [...]Source: autoevolution