For the most part Firehawk is right. The reality is that the vq37 is pretty much forced to the limits out of the box. You can get some power out of losing the stock cats and exhaust and a tune will help assuming you have all the bolt ons for maximum gains.
An oil cooler IMO was the best mod I did after the GTHaus Exhaust because it allowed me to drive the car hard without going into limp mode. Good luck OP but don't be surprised when the gains are far less than you're projecting in this thread, your numbers are overstated.
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2009 Carbon Fiber/Red 370z aka Trish: Sports Package, Meisterschaft full catback, Fast Intentions Longtube Headers, Injen Long Tube Intakes, UpRev Tune: Sold 
2008 Lotus Exige S Club Racer aka Bella, always leaves me smiling
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