I have the FRPP kit on my 2010 S, I went with the Steeda 21mm kit and it made a big difference in handling. Just like you, I didn't have any factory mounts and thats why I got the Steeda. Still have to get the plates welded to stop the noise but thats what the radio is for. Good luck and enjoy.
2007 Hyundai, Santa Fe, GLS. & 2013 Hyundai, Accent, GLS sedan.
Focus S #1, Sedan Revolution #192, Rally Revolution #8, March 2012 SOTM
Focal Distortion, a Ford licensed club and FSC member.
Sgt, USMC (1999-2003)