Brenspeed Supercharges the Mustang Boss 302 to 715 HP
25 Aug 2013, 09:41 UTC · By: Ciprian Florea / 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 horsepo...