user647_pic37360_1313200911.gif Tuning - Nissan 370Z Forum
"Tune" meaning you would have to buy a software license like UpRev, EcuTek, etc, each cost a few hundred bucks. Then go to a dyno with a person who knows how to use that software. With the bolt-ons you have listed it's not 100% needed but it would help. If you put headers on you should get a tune for sure.