Not sure if there's room there, but I am considering an install similar to FstQban's subwoofer mounted on the left side of the trunk.

If I remember right, the sub installed in that pic needs .625 ft^3 which is half of what JL recommends for a 10w7. Hopefully, building the box to be more square will make up that difference without sacrificing too much of what little trunk area there is in the Z. I am assuming a rectangular shape with the backside molded around the various shapes of that wall could get very close to the 1.25 ft^3 the 10w7 requires.

Since I do not have my Z yet, it is difficult to work out all the measurements, so i suppose the question is: Is this even possible?

 

you checked the mounting depth on the w7's? that might factor in quite a bit on the box size

 

Mounting depth on a 10w7 is like 9", I think the 10w6 or 10w6v2 might be a safer choice, and is probably about as deep as you can go...the w7 models require alot of mounting depth, and it will be a big push to get that one in there...

 

How about considering the new 8W7 .

 

I think any of the W7's will be too deep to mount in that side fashion.