AM has them listed as working with all 05-13 Mustangs, so it is kinda confusing.
AM also says
"Improves Handling. Improve the handling and performance of your Mustang by replacing those soft stock factory front strut mounts with an upgraded harder pair that were featured as original equipment on the 2011 Shelby GT500 Track Pack option.
Ford Racing Quality. When adding performance suspension parts to your Pony, trust the folks that know it best to provide top quality components that are made to out perform and out last the competition.
Application. This pair of Ford Racing Strut Mounts are a direct fit upgrade for the 2005-2010 GT, V6, and 2007-2012 Shelby GT500. They will also fit 2011-2012 GT and V6 models, but will require Ford Racing lowering springs and struts/shocks for installation.
Mustang Fitment: 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Details >>"