Exhaust
Sound is something that every car guy considers at the top of his or her list of what is important to their ride. Take, for example, the stereotypical sport compact driver. He or she typically has a huge muffler or mufflers and corresponding exhaust tip(s) that make those cars sound as if they are going 100 mph, even when cruising at slow speeds. We Ford guys know that good sound on a real performance car is also important, but we also know that sound must be backed up with corresponding performance.
The jump in boost pressure upped the power output from 559 hp to a whopping 613 hp. The peak torque was up as well, from 513 lb-ft to 545 lb-ft.