I have been toying with the idea of the K&N intake, at the very least the Focus will ultimately see the K&N drop-in filter at some point.
The Steeda rear sway bar is definitely a possibility though, I've heard great things about it.
I'm sure I could get away with some light modifications in the drivetrain/chassis departments but don't want to push my luck.
2012 Yellow Blaze Focus SE Sedan (DD+Project)
1992 Bright White Grand Prix SE Sedan (Project)
SR #74/SMk3C #17/YBOC #03