air intake... no its not really doing enough. the SVT exhaust yet. You also need to look at a tune to remove EGR (some have said there are "other ways") or you will have a cell. The SVT exhaust will lean out the motor to what some say is "unsafe". Focus power will provide updates for when new parts are added on. Note though the Xcal 2 program is tied to the vin number via the ECU. you will need to get one for each vehicle if you want a tune on each.
2001 ZX3 2.0L Zetec-
Hatch Nation #42
Going through Rebuild See "The TICK Build Thread" for details (http://www.focusfanatics.com/forum/showthread.php?t=289168&referrerid=62897)