Just had Megan Racing coilovers installed on my 2013 SHO yesterday. I went to a local shop for the install and alignment. The tech said that the kits itself installed very easily, however he had trouble with the alignment due to some of the adjustment bolts being frozen/locked in place. Sounds like he just needed to apply a bit of extra muscle and was able to adjust everything back into OEM alignment. Not sure for your 2011, but my 2013 did not require the use of the larger rear cam bolt.