Ok folks, now we know a little more, or perhaps, much more about the details of the new GT Ecoboost Performance pack. They were liked today.

http://www.torquenews.com/106/2015-f...details-leaked

Based on the official order guide for the 2015 Ford Mustang, the Performance Pack will be available for the S550 Mustangs fitted with either the 4-cylinder turbocharged EcoBoost engine or the 5.0L V8-powered GT. Surprisingly, there is no mention of a Performance Pack for the base V6 Mustang, but I would expect to see something arrive for the popular base model in the near future.