07-09 shelby are the same,8" double disc
2010-2012 are the same.8.5 double disc
2013-2014 are 10" double disc .....
2010 and up flywheels are the same....
2013-2014 clutch set up will require the larger slave
2013-2014 are by far the the best the factory has devloped....better than any Spec aftermarket.
Yes, when Ford did my clutch TSB up-grade they placed a 2012 clutch in my 09 and used the different slave cylinder, I however thought it was to soft and decided a couple weeks later to get the McLeod RXT. Then I needed to get a 2009 Slave Cylinder.:fm: