Tested with factory dampers.

Lowers
1.1 in Front | 1.7 in Rear
2011-2014 Ford Mustang Coupe 5.0L S1972011-2014 Ford Mustang Coupe 3.7L V6 S197
2011-2014 Ford Mustang Convertible 3.7L V6 S1972011-2014 Ford Mustang Convertible 5.0L S1972012-2013 Ford Mustang Boss 302 S197