I'm actually looking into intake/exhaust upgrades to the Focus now that I have some time, so its good to hear more feedback in this thread.
Definitely feeling the Magnaflow though, still need to look at others.
2012 Ford Focus SE Sedan, Red Candy Metallic Tinted CC, 5 Speed Manual
SE Sport and Winter Packages, 203A Equipment Group, 17" M&P Wheels
K&N 69-3517TS Intake, Magnaflow 15138 Catback Exhaust, WeatherTech 82573 Window Visors, 35% ON-35 Madico Tint