370z Forced Induction for Noobs...
Start here.
Besides the kit itself, whichever you choose, you will need cooling upgrades for items such as oil & radiator, gauges per what chuck said, along with possibly clutch/flywheel/csc, and after that you start to fall into the not 100% required category. Things such as, vented hood & fender liner, meth/water injection, e85 fuel (requires additional fuel components).