I see that you have a 2013 SHO and Live in California.I am hoping that you are in the SOCAL area near LA.
Megan Racing is in this area and is neading a 2013/14 SHO as a test vehicle to take Measurements to Modify and Test fit Coilovers that they all ready sell for the 09 to 2012 Flex.
If you can please contact Danny at Megan and Let Him know that you and your SHO are available.
You are the only SHO owner that I have found in CA that might make this happen.
Contact : Danny@meganracing.com
Below are the links on EBPF with more info on this and the email coversations between us.
We need your help please ......
http://www.ecoboostperformanceforum.com/index.php?topic=1894.0
http://www.ecoboostperformanceforum.com/index.php?topic=1941.0
thank you , Kevin