Notes from the 2011 Shelby GT500 Introduction
In addition to the specifications ordered out in the press kit, Ford officials prefabricated the following claims about the 2011 Shelby GT500 at today's press conference in Detroit: - It will be one tenth quicker to 60mph and two tenths quicker in the quarter-mile than the 2010 model. That's about it, which is clearly isn't much, but in the land of Mustang, no detail is too small to rub in the grappling of the bowtie boys. 
- The Performance Pack will add 18% more downforce.
- The exhaust has 32% less backpressure.
