Steedas power Pack adds a good kick for a low price. With the intake and exhaust you get a decent bump in TQ that is noticeable. Also look at the dyno thread stickied at the top of this forum and see what people have done.
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