NISSAN INFINITI G35 G37 VQ35HR TO ID55MM (without mounting holes) ITB ADAPTER
 (optional additional fuel rail) 
This adapter is for you to convert your engine to your preferred Individual Throttle body that you want to use.
The internal diameter of the hole is ID55mm which is customizable in case you want it differently.
Also the distance between each ITBs would be 112.2mm so you will need to adjust your linkage brackets accordingly.
You will need to drill and thread your own mounting holes accordingly to the ITBs you are going to use or if you let us know we will drill and thread it for you before we post it to you.
The optional additional fuel rail with 6 injectors is also an option. We will provide 1/8 NPT stoppers for the additional injector ports in case you dont need to use them. 
Please do let us know if you need any further information.