Plug N Play. Maybe a bit more grease...but the ZX3 and the SVT are the same. All Focus sways interchange on all Foci--the only catch is if the RSB needs an adaptor kit (Steeda) or has OE bracket mounts. Its all pretty simple. Cars with OE RSBs are 21mm, except the SVT, Street Edition and S2--those are 22mm. If the car has an OE RSB, the FSB is 21mm, except the Street Edition Wagon--that is 22mm. If the car same sans RSB, the FSB is 18mm. But all sways interchange.