Yes you will need a 4 coil ign. kill box or a t kill (old school, but still works). That cycletek kit is a great set up. Matt is a sponsor at my local series and is out there every race helping out with setups even if it has nothing to do with his product. You can also get a kit from schnitz or mps. Any of them with the ign kill, ram, bottle, valve, lines, an fittings will run you $3-400. A lot people run nitrous through there airshifters to cut down on bottles and weight. One thing to think about when doing this, is there can be a pressure drop in the nitrous when hitting the airshifter.
'06 "Corn Burner" Edition ZX10R
w/ a lot of bolt-ons
PERFORMANCE CYCLE 2 Racing