I know this isn't a 370z or a G37, but I thought I post it anyway since it is a VQ, and one of the kits that I produce.....
I have had a customer that decided to do a bit of a custom mid mount kit, using a Precision 7675 T4
.96 a/r billet JB turbo. The run was made on the new DJ dyno at Dynosty. E85 fuel and 30psi of boost. The engine was built by the guys at Dynosty...IMO one of the best VQ builders in the United States.
The car was running out of fuel, so full HP potential was not reached. The numbers are still impressive if you ask me....
Video:
934WHP Built 350Z on Dynosty Dyno - YouTube
With the recent release of the all new PTE 6870 turbo, I would expect similar results with the VHR twin scroll kit.