Stand alones are an option but you lose a lot with their use. If you are making a dedicated race car it would be a different story. But for a street driven focus it is over kill.
Dyno numbers: 177hp/163tq
Mods: Steeda Intake, STS Kit, Rear sway bar, Lowering springs, Steeda RMM, Magnaflow catback, SCT Tune
Moderator: Third Generation Ford Focus, DURATEC Ti-VCT GDI Performance Chat & Florida regional section