Specifically KW coilovers for the Stangs. I used them on my European Cars and I know that they are available for the Stang. Best quality suspension around imo.
Here is the link:
http://www.kw-suspension.com/en/30_Products/60_Product_Finder/index.php?modell_1=Mustang&level=3&hersteller_1=FORD&gruppe=all&zeile=15
Here is the link:
http://www.kw-suspension.com/en/30_Products/60_Product_Finder/index.php?modell_1=Mustang&level=3&hersteller_1=FORD&gruppe=all&zeile=15