Im looking to do a custom sub enclosure in my G35 coupe. I am going to sub contract it out to a shop anyone can help me with (area and volume) dimensions for the space that’s right in the middle towards the rear seats?

 

I'm not sure I understand your question. If you "sub contract" the enclosure to a shop won't they be designing it for you? Usually you would tell them what type and how many subs you're putting in and they can measure the space where you want the enclosure so they can build it to specs.

 

got ya.. I just called the company that is going to do the box for me. Yea why I said sup contract.. I wanted to have the company making the box separate from the person installin the system.