Their turbos need to be modified. Basically, for singles you have to modify the pipe coming from passenger side, the down pipe(or mid pipe) and possible the oil lines. For twins you'll have to modify the passenger side down pipe I believe. Superchargers should fit but their intercoolers will need some modification on the brackets and on the intake pipes. The intercooler work also applies for the turbos. There're several more experienced people here so guys correct me if I'm wrong
If you're looking for an easy FI application, your best bet is contacting one of the local sponsors over there for a new Stillen with warranty. I got a deal for $5500 installed for the stage 2 once. I believe you can find a similar deal as well..