With a wet system, plan on fuel pump at a minimum. I'm pretty sure this is the one Garm is running...
http://perrinperformance.com/product...bro?category=7 The wet kit will use wet style nozzles, meaning the fuel and nos jets are in the same nozzle. In other words, you don't need to mess with the stock injectors or fuel rail, since the added fuel won't be being added through there. Also, methinks you are going to need some type of engine management, or else all that added fuel might cause the computer to lean out the injector stream, hence killing your engine.
__________________
Toyota
Moving Forward
...even when you don't want it to.
Special thanks to Cali Yaris, 1NZYaris1 and lilredrocket