Hi Martin..thx for the photos!
Apart from exhuast and twin turbo..are u keeping internals same? if so i assume max output will be 390hp.. then may not need to upgrade much.. obviously take the Z out for comprehensive test drive and check see if the brakes hold well and if the tyres can tolerate power when u floor it before deciding anything.
But anything u do buy (especially expensive tech stuff)... better to get it from Phil in UK, it saves a lot of hassle, next day delivery and he offers top customer service and advice. I think he also makes a donation to the 350z-uk site with every order we make.