I bought the Ford Racing M-5570-A Jounce Stops hoping the rear ones would be a bit shorter than the stock ones ... but I am not sure they are shorter. I have not installed them yet, but here's a preview of the parts. The rears have part number BR3V-5K570-B.

http://www.fordracingparts.com/parts...KeyField=12272

Installation Instructions:

http://www.fordracingparts.com/downl...htM-5570-A.pdf