Hey Brett!
We have GReddy Exhausts, Fujita/Injen intakes. Suspension upgrades are also available. Cobb will be releasing their AccessPort computers soon for the z's as well. From there, we also offer VOLK wheels, which will help reduce unsprung weight as well as look amazing. You can give us a call and we can go over in detail what's out there for your car. From there, you can decide what parts you want, and who you want to buy from. Take a look through here, it'll give you an idea of what's available specifically for your vehicle. Like I said, from there you can start deciding what direction you want to go.
http://www.velocityfactor.net/...y=123
-=Tristan